Giving a test to a group of students, the grades and gender are summarized below A B C Total Male 9 6 5 20 Female 18 20 10 48 Total 27 26 15 68 If one student is chosen at random, Find the probability that the student was NOT a male that got a "B"

Answers

Answer 1

The probability that the student was NOT a male that got a "B" is 62/68, which can be simplified to 31/34. To find the probability that the student was NOT a male that got a "B," we need to first calculate the total number of students that fit this criteria.

From the table, we know that there were a total of 26 students who did not receive a "B" (15 females and 11 males). Out of those 26 students, there were 11 males who did not receive a "B".

Therefore, the probability of choosing a student who was NOT a male that got a "B" is:

(15 + 11) / 68 = 26 / 68 = 0.382 or approximately 38.2%

So the probability that the student chosen at random was NOT a male that got a "B" is 0.382 or 38.2%.

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Related Questions

A committee consisting of 3 men and 5 women is selected from 5 men and 10 women. Find how many way, this committee can be formed​

Answers

There are 2,520 ways to form a committee consisting of 3 men and 5 women from a group of 5 men and 10 women.

How to determine how many way, this committee can be formed

The combination formula gives the number of possibilities to choose a committee of three persons from a group of five:

C(5, 3) = 5! / (3! * 2!) = 10

Also, the number of ways to select a committee of 5 women from 10 women is given by:

C(10, 5) = 10! / (5! * 5!) = 252

The total number of ways to select a committee consisting of 3 men and 5 women: 10 * 252 = 2,520

Therefore, there are 2,520 ways to form a committee consisting of 3 men and 5 women from a group of 5 men and 10 women.

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The finding that more baseball players are hit with pitches by pitchers on the hottest days of the season is most consistent with:

Answers

It is important to conduct further research to determine the underlying causes of this phenomenon and to rule out alternative explanations.

The finding that more baseball players are hit with pitches on the hottest days of the season could be due to several reasons. One possible explanation is that the heat makes the pitchers more fatigued, which could lead to them losing control of their pitches and accidentally hitting batters. Another possibility is that the heat may make the ball more difficult to grip, which could affect the accuracy of the pitch.

However, it is also possible that this finding is simply a coincidence or the result of other factors. Therefore, it is important to conduct further research to determine the underlying causes of this phenomenon and to rule out alternative explanations.

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The volume of a square pyramid is equal to _____ times the volume of a cube where the bases are the same, but the square pyramid is half the height of the cube. A. B. C. D. Please select the best answer from the choices provided A B C D

Answers

The volume of a square pyramid is equal to 1/6 times the volume of a cube when the bases are the same, and the square pyramid is half the height of the cube. The best answer is A.

The volume of a square pyramid can be found using the formula V = (1/3)Bh, where V represents the volume, B is the area of the base, and h is the height of the pyramid. For a cube, the volume formula is V = s^3, where s is the length of a side.

In this scenario, the bases of the square pyramid and the cube are the same, which means that the area of the base (B) and the length of a side (s) of the cube are equal. Additionally, the square pyramid has half the height of the cube. Let's denote the height of the pyramid as h and the height of the cube as 2h.

Now, let's compare their volumes:

Volume of the square pyramid = (1/3)Bh
Volume of the cube = s^3 = B * 2h (since B = s^2)

To find the relationship between their volumes, divide the volume of the square pyramid by the volume of the cube:

(Volume of the square pyramid) / (Volume of the cube) = ((1/3)Bh) / (B * 2h)

Simplify this equation:

(1/3) / 2 = 1/6

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y = 12 x + 2 2y = x + 4Use substitution. What is the solution to the system of equations? Use the drop-down menus to explain your answer. y = 12 x + 2 2y = x + 4 The system of equations has Choose... . The two equations represent Choose... .

Answers

The system of equations has one solution. The two equations are intersecting lines.

Substitution Method:

The substitution method is one of the algebraic methods to solve simultaneous linear equations. It involves substituting the value of any one of the variables from one equation into the other equation.

We have the equations are:

y = 12 x + 2 ___eq.(1)

2y = x + 4 ____eq.(2)

You have to plug in y for 12x+2 in the second equation.

2(12x+2)=x+4

Simplify the equation:

24x + 4 = x + 4

Subtract 24x from each side

4 = -23x+4

Subtract 4 from each side

0 = 23x

Divide each side by 23

x=0

Now, plug in 0 to one equation.

y=12(0)+2

y=2

The lines intersect at one point, (0,2)

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Steven and his family ordered a meal that cost $136.50. Steven paid 14% sales tax and left a 20% tip on $136.50. What was the total cost?

Answers

136.50x0.14=19.11 in sales tax
136.50x0.20=27.30 in tip

136.50+19.11+27.30= $182.91 total cost

SaleCo hardware store has lowered prices for some of the products, as described here: (a) all types of saws (i.e., products whose description contains the word saw) have been discounted by 15% (b) all hammers (i.e., products whose description contains the word hammer) have been discounted by 7%

Answers

A pricing policy change for a hardware store, all products containing the word "saw" in their description have been discounted by 15%, and all products containing the word "hammer" in their description have been discounted by 7%.

This statement describes a pricing strategy employed by SaleCo hardware store, which involves offering discounts on certain products. Specifically, the store has lowered prices on saws and hammers by 15% and 7%, respectively.

Discounting is a common pricing strategy used by businesses to stimulate sales and attract customers.

By lowering the prices of certain products, a store can increase the perceived value of these items and make them more appealing to customers.

This can result in increased sales, which can ultimately lead to higher profits.

The store has chosen to discount saws and hammers.

These products are likely to be in high demand among customers who engage in woodworking or DIY projects, and the discounts are intended to attract these customers and encourage them to make a purchase.

The discounts offered by SaleCo on saws and hammers are relatively modest, with a 15% discount on saws and a 7% discount on hammers. Even small discounts can have a significant impact on sales if they are applied to high-demand products.

The pricing strategy employed by SaleCo is a common one in the retail industry, and it is intended to stimulate sales and attract customers.

By offering discounts on saws and hammers, the store is hoping to increase its customer base and generate more revenue.

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In Ms. Smith's class, each student averages one day absent out of thirty. What is the probability that out of any two students chosen at random, one student will be absent while the other is present

Answers

The probability of out of any two students chosen at random, one student will be absent while the other is present is 29/450 or approximately 0.064.

Let's denote the event that a student is absent as A and the event that a student is present as P.

The probability of a student being absent is P(A) = 1/30, which means the probability of a student being present is P(P) = 29/30.

We want to find the probability that out of any two students chosen at random, one student will be absent while the other is present.

There are two possible cases for this event:

The first student is absent and the second student is present

The first student is present and the second student is absent

Let's calculate the probability of each case separately:

Case 1: The probability of the first student being absent is P(A) = 1/30. The probability of the second student being present is P(P) = 29/30. Therefore, the probability of the first student being absent and the second student being present is:

P(A and P) = P(A) × P(P) = (1/30) × (29/30) = 29/900

Case 2: The probability of the first student being present is P(P) = 29/30. The probability of the second student being absent is P(A) = 1/30. Therefore, the probability of the first student being present and the second student being absent is:

P(P and A) = P(P) × P(A) = (29/30) × (1/30) = 29/900

The total probability of one student being absent and the other being present is the sum of the probabilities of the two cases:

P = P(A and P) + P(P and A) = (29/900) + (29/900) = 58/900

Simplifying the fraction by dividing both the numerator and denominator by 2, we get:

P = 29/450

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The variation in the dependent variable explained by the independent variable is measured by: A) the mean squared error. B) the sum of squared errors. C) the regression sum of squares.

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C) the regression sum of squares.

The variation in the dependent variable explained by the independent variable is measured by the regression sum of squares (RSS). The RSS quantifies the amount of variation in the dependent variable (y) that is accounted for by the regression model, which includes the independent variable(s) (x) and their estimated coefficients.

The regression sum of squares is calculated by summing the squared differences between the predicted values (based on the regression model) and the mean of the dependent variable. It represents the variation in the dependent variable that is "explained" or "captured" by the regression model.

The mean squared error (A) and the sum of squared errors (B) are other measures related to regression analysis, but they do not specifically quantify the variation explained by the independent variable.

The mean squared error represents the average of the squared differences between the observed and predicted values, while the sum of squared errors represents the total sum of squared differences between the observed and predicted values.

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If we took an SRS of 1700 people from California (population 34 million) and an SRS of 1000 people from Detroit (population 1 million) which sampling distribution would have the smaller standard deviation

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Therefore,  SE1/SE2 is less than 1, we can conclude that the sampling distribution for the SRS from California (1700 people) would have a smaller standard deviation compared to the SRS from Detroit (1000 people).

The sampling distribution for the SRS of 1000 people from Detroit would have a smaller standard deviation because the population size is smaller. As population size increases, the standard deviation of the sampling distribution decreases, so the larger population of California (34 million) would result in a larger standard deviation for the sampling distribution of the SRS of 1700 people.

we need to compare the standard errors of the two simple random samples (SRS) from California and Detroit.
Standard Error (SE) is calculated as follows:
SE = σ / √n
where σ is the population standard deviation and n is the sample size.

1. For California:
Sample size (n1) = 1700
Population size (N1) = 34 million

2. For Detroit:
Sample size (n2) = 1000
Population size (N2) = 1 million
Now, let's compare the SE for both:
SE1/SE2 = (σ1/√n1) / (σ2/√n2)


Without knowing the population standard deviations (σ1 and σ2), we cannot determine the exact standard errors. However, since both samples are taken from human populations, it's reasonable to assume that the population standard deviations are relatively similar.
Therefore, we can focus on the sample sizes to compare the standard errors:
SE1/SE2 ≈ (√n2) / (√n1)
SE1/SE2 ≈ (√1000) / (√1700)
SE1/SE2 ≈ (31.62) / (41.23)
SE1/SE2 ≈ 0.77

Therefore,  SE1/SE2 is less than 1, we can conclude that the sampling distribution for the SRS from California (1700 people) would have a smaller standard deviation compared to the SRS from Detroit (1000 people).

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If the average weight for women is normally distributed with a mean of 135 pounds and a standard deviation of 15 pounds, then approxi- mately 68% of all women should weigh between and pounds. a. 120; 150 b. 120; 135 c. 105; 165 d. Cannot say from the information given

Answers

This is because of the empirical rule, which states that for a normal distribution, approximately 68% of the data falls within one standard deviation of the mean. The answer is option B: 120; 135.

In this case, one standard deviation above the mean is 150 pounds (135 + 15) and one standard deviation below the mean is 120 pounds (135 - 15). Therefore, approximately 68% of all women should weigh between 120 and 150 pounds.
If the average weight for women is normally distributed with a mean of 135 pounds and a standard deviation of 15 pounds, then approximately 68% of all women should weigh between:

1. Calculate the lower limit: mean - standard deviation = 135 - 15 = 120 pounds
2. Calculate the upper limit: mean + standard deviation = 135 + 15 = 150 pounds

So, approximately 68% of all women should weigh between 120 and 150 pounds. The correct answer is option a. 120; 150.

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Assume that you are pouring a wall that is 151 feet - 4 inches long, 14 feet high and 16 inches thick and the daily placement rate is 375 cubic yards per 8-hour day. What is the rate of pour in feet per hour

Answers

The rate of pour in feet per hour is approximately 2.51 feet per hour.

First, we need to convert the dimensions to feet:

Length = 151 feet 4 inches = 151.33 feet

Height = 14 feet

Thickness = 16 inches = 1.33 feet

Next, we need to calculate the volume of the wall:

Volume = Length x Height x Thickness

Volume = 151.33 x 14 x 1.33

Volume = 2813.89 cubic feet

To convert cubic feet to cubic yards, we divide by 27:

Volume = 2813.89 / 27

Volume = 104.22 cubic yards

Given the daily placement rate of 375 cubic yards per 8-hour day, we can calculate the rate of pour in cubic yards per hour:

Rate of pour = 375 / 8

Rate of pour = 46.88 cubic yards per hour

Finally, we can convert the rate of pour to feet per hour by dividing by the cross-sectional area of the wall:

Cross-sectional area = Height x Thickness

Cross-sectional area = 14 x 1.33

Cross-sectional area = 18.62 square feet

Rate of pour in feet per hour = Rate of pour in cubic yards per hour / Cross-sectional area

Rate of pour in feet per hour = 46.88 / 18.62

Rate of pour in feet per hour ≈ 2.51 feet per hour

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3.In match play, after the hole has begun, the players agree to consider the hole tied. What is the ruling

Answers

In match play, when the players agree to consider the hole tied after it has begun, the ruling is known as "halving the hole."

In match play, if the players agree to consider the hole tied after it has begun, the hole is deemed halved, and the players move on to the next hole without any penalty strokes. This is called "conceding the hole" and is a common practice in match play.

This means that both players receive half a point for the hole, and the match proceeds to the next hole.

However, it's important to note that once a player has hit their ball, their opponent cannot concede the hole unless the player's ball is deemed unplayable, lost, or out of bounds. In that case, the opponent can concede the hole, and the player can move on to the next hole without completing the current one. But if both players agree to consider the hole tied before any shots are taken, the hole is halved, and the players can move on without any penalty strokes.

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The Natural Exponential Function II

Find the amount A in dollars of $9000 invested for 30 years at

11% compounded continuously. (Enter a number. Round answer to the

nearest cent.)

$______

Answers

To find the amount A in dollars after investing $9,000 for 30 years at 11% compounded continuously, we will use the continuous compound interest formula:

A = P * e^(r*t)

Here,
A = final amount
P = principal amount (initial investment)
e = Euler's number (approx. 2.71828)
r = interest rate (decimal)
t = time (years)

Given values:
P = $9,000
r = 11% = 0.11 (convert percentage to decimal by dividing by 100)
t = 30 years

Plug these values into the formula:

A = 9000 * e^(0.11 * 30)

A ≈ 9000 * e^(3.3)

A ≈ 9000 * 27.1126 (rounded to 4 decimal places)

A ≈ 243,913.4

Therefore, the amount A in dollars after investing $9,000 for 30 years at 11% compounded continuously is approximately $243,913.40 (rounded to the nearest cent).

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What is the product of :- (3a^2)×(5a^3)=...........

Answers

Answer:

I was not sure if it was positive or negative so I did both

Positive = 15a^5

Negative = -15a^5

Step-by-step explanation:

:)

many diuretic drugs reduce the reabsorption of na and water in the kidneys. as a result,

Answers

Many diuretic drugs reduce the reabsorption of sodium and water in the kidneys. As a result, the volume of urine produced by the kidneys increases, leading to decreased fluid retention and reduced blood pressure.

This is because the excess sodium and water in the body are excreted through urine, causing the blood volume to decrease, and blood vessels to dilate, resulting in lower blood pressure. However, it is important to note that diuretic drugs can also cause side effects such as electrolyte imbalances, dehydration, and increased urination frequency. It is crucial to follow the prescribed dosage and consult a healthcare professional before taking diuretic drugs.

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Business Transactions Jack Hines, owner of TechVision.com Web Sites, began business operations on May 1 of this year. during the month of May, the business completed the transactions that follow.

Answers

Finally, come the end of May, the company's tangible assets amount to $89,000, liabilities equates to $10,000 and equity has reached $79,000.

How to solve

Here is a table for the given data:

Transaction Assets Liabilities Equity

Initial 0 0 0

1 50,000 0 50,000

2 10,000 10,000 0

3 25,000 0 25,000

4 -5,000 0 -5,000

5 15,000 0 15,000

6 -3,000 0 -3,000

7 -1,000 0 -1,000

8 -2,000 0 -2,000

Totals 89,000 10,000 79,000

Upon calculation of the conclusive sums for assets, liabilities and equity it can be determined that:

Assets stand at $89,000 being composed of an investment total of $50,000, office equipment worth $10,000, billed services in the amount of $25,000, as well as a received cash sum of $15,000 offset by rent expenses of $5,000, utility costs of $3,000, insurance payments of $1,000 and a withdrawal of $2,000.

Liabilities also exist however are far lower at only $10,000 linked to office equipment paid on account.

Equity stands at $79,000 combining the previously detailed assets minus their respective costs with regards to rent, utilities, insurance and withdrawal.

Finally, come the end of May, the company's tangible assets amount to $89,000, liabilities equates to $10,000 and equity has reached $79,000.

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Jack Hines, the owner of TechVision.com Web Sites, began business operations on May 1 of this year. During the month of May, the business completed the following transactions:

Invested $50,000 cash into the business.

Purchased office equipment for $10,000 on account.

Billed customers $25,000 for web design services.

Paid $5,000 cash for office rent.

Received $15,000 cash from customers for the previously billed services.

Paid $3,000 cash for utilities.

Paid $1,000 cash for business insurance.

Withdrew $2,000 cash for personal use.

Can you provide a summary of these transactions and calculate the ending balances for assets, liabilities, and equity?

A 50 foot ladder is set against the side of a house so that it reaches up 48 feet. If Mila grabs the ladder at its base and pulls it 6 feet farther from the house, how far up the side of the house will the ladder reach now

Answers

The ladder will reach up to a height of approximately 27.39 feet (rounded to two decimal places).

We can use the Pythagorean theorem to solve this problem. Let's call the distance from the base of the ladder to the house "x". Then, according to the Pythagorean theorem:

[tex]x^2 + 48^2 = 50^2[/tex]

Simplifying this equation, we get:

[tex]x^2 + 2304 = 2500[/tex]

Subtracting 2304 from both sides, we get:

[tex]x^2 = 196[/tex]

Taking the square root of both sides, we get:

x = 14

So the ladder is currently 14 feet away from the house. If Mila pulls the ladder 6 feet farther away from the house, it will be 20 feet away from the house. We can use the same equation to find out how high up the ladder will reach:

[tex]x^2 + y^2 = 50^2[/tex]

Substituting x = 20 and simplifying, we get:

[tex]y^2 = 1500[/tex]

Taking the square root of both sides, we get:

y = 5√30

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A(n) _______ is used by forklift drivers to let them know how much of each item to get from specific storage areas in a distribution center.

Answers

A picking list is used by forklift drivers to let them know how much of each item to get from specific storage areas in a distribution center.

Explanation:

A picking list is a document that is used by forklift drivers and other warehouse personnel to identify the specific items and quantities that need to be picked from specific storage locations in a distribution center.

The picking list typically contains information such as the item number, description, location, and quantity needed for each item. It may also include other details such as the customer's name, order number, and delivery date.

The purpose of the picking list is to ensure that the correct items are picked in the correct quantities, and that they are picked from the correct storage locations. This helps to ensure that orders are filled accurately and efficiently, and that inventory levels are properly managed.

Once the items are picked, the picking list may be used to update inventory records and to generate packing slips or other shipping documents. The picking list is an essential tool in the warehouse and distribution process, and it helps to ensure that customers receive the correct products on time.

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Yvette is a veterinarian who wants to find an equation that relates the weight, in pounds, of a cat with its age, in years; its length, in inches; and its average daily intake of cat food, in calories. What is the correct format for a multiple regression equation

Answers

The correct format for a multiple regression equation is: Weight = b0 + b1(Age) + b2(Length) + b3(Calories) + e

Yvette can use a multiple regression equation to relate the weight of a cat with its age, length, and average daily intake of cat food. The regression equation: Weight = b0 + b1(Age) + b2(Length) + b3(Calories) + e

where Weight is the cat's weight in pounds, Age is the cat's age in years, Length is the cat's length in inches, Calories is the average daily intake of cat food in calories, b0 is the constant term, b1, b2, and b3 are the coefficients for each variable, and e is the error term.

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Consider the following triangle.
A
с
13
B
12
2016 StrongMind. Created using GeoGebra
IM
C
Based on the given information, what is the measure of the missing length, c?
Enter your answer as a number like this: 42

Answers

The missing side of the right triangle is 5

Missing length of the right triangle

Right triangles are described as having a right angle that is 90 degrees. The hypotenuse, or side facing the right angle, is the longest side. The other two sides of a right triangle are its legs.

Using the Pythagorean theorem;

According to the theorem that I have just mentioned above, we can write for the right triangle that;

[tex]c^2 = a^2 + b^2[/tex]

Then in the particular case that we have in this problem;

[tex]c = \sqrt{} 13^2 - 12^2[/tex]

c = 5

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49) Ms. Setzer provides her second graders with opportunities to communicate in many situations. Her students show gains in the communicative side of language. Ms. Setzer emphasizes

Answers

Ms. Setzer's emphasis on providing her second graders with opportunities to communicate in various situations is an excellent approach to enhancing the "communicative side of language." Ms. Setzer's approach to emphasizing communication is a beneficial strategy for promoting "language development."

Communication is a fundamental aspect of language, and it is essential for individuals to be able to communicate effectively in various situations.

By providing students with opportunities to communicate in different contexts, Ms. Setzer is enabling her students to develop their communication skills. These opportunities can include pair and group work, class discussions, presentations, and writing assignments. Through these activities, students learn how to express themselves, listen actively, and understand others' perspectives. Furthermore, these activities can help build students' confidence in communicating, which is a critical component of communication.Ms. Setzer's focus on communication has also likely led to gains in other areas, such as reading and writing. As students become more comfortable with communicating, they may also become more comfortable with reading and writing as they develop the skills needed to understand and produce language.Overall, Ms. Setzer's approach to emphasizing communication is a beneficial strategy for promoting language development. By providing opportunities for students to communicate in various contexts, she is helping them develop essential skills that will serve them well in their future academic and personal lives.

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A local salesman receives a base salary of $750 monthly. He also receives a commission of 10% on all sales over $550. How much would he have to sell in a month if he needed to have a monthly income of $3000

Answers

The salesman needs to sell $23,050 worth of products to reach his target monthly income of $3000.

To determine how much the salesman needs to sell in a month to reach a monthly income of $3000, we need to consider both his base salary and commission.

Let X be the total amount of sales he needs to make to reach his target income. We can start by setting up an equation to represent his total income in terms of his base salary and commission:

Total Income = Base Salary + Commission

Total Income = $750 + 10%(Sales - $550)

Since his commission is only earned on sales above $550, we subtract $550 from the total sales to calculate the commissionable amount.

We know that his total income needs to be $3000, so we can set up an equation to solve for X:

$3000 = $750 + 10%(X - $550)

$2250 = 10%(X - $550)

$22500 = X - $550

$23050 = X

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if sin of theta=1/2 and 0°<0<180 the smaller value of 0 is

Answers

30-degree is the smallest value of the [tex]\theta\\[/tex].

If sin(θ) = 1/2 and 0° < θ < 180°, then we know that θ is an acute angle in the first or second quadrant of the unit circle, since sine is positive in those quadrants.

To find the value of θ, we can use the inverse sine function (sin^-1) on both sides of the equation:

[tex]sin^{-1}(sin(\theta)) = sin{^-1}(1/2)[/tex]

θ = 30° or 150°

Since 0° < θ < 180°, the smaller value of θ is 30°.

Therefore, the smaller value of θ is 30°.

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Some surveys are so sensitive that people do not want to give their names with their response. Suppose in one such survey the researchers assign each participant a randomly generated code, which they use to obtain their results later. Is this procedure anonymous testing or is it confidential testing

Answers

This procedure is confidential testing. Confidential testing is a method of data collection where the participant's identity is known to the researcher, but is kept confidential and not disclosed to others. In this case, the researchers assign each participant a code, so they can link the results to a specific participant but do not disclose their identity to others. In contrast, anonymous testing is when the participant's identity is not known to the researcher or anyone else, so there is no way to link the results to a specific participant.

find the unknown number​

Answers

The above are irregular polygons. Their missing external angles are given as follows:

A) x = 30°

6) x = 105°, y = 55°

B)  x = 70°; y =

F) x =  138.33°

How did we arrive at the above?

A)

Sum of angles in a pentagon = 540°

Missing internal angle = 540 - (95+100+110+85) = 150

Since exterior angle = 180 degre - it's liner pair

180 - 150 = 30°

so , x = 30°

6)

Sum of angles in hexagon = 720°

To get x and y we must find the missing internal angle (e) between vertex 105° and 145° and (f) between 105° and 115°

Since its' external angel = 45

e = 180-45 = 135°

So f = 720 - (135 + 105 + 115+ 125+ 145)

f = 95°
so x = 180-f = 180-95 = 105°

y = 180-125 = 55°

b) Sum of angles in  a heptagon = 900°

Lets call missing internal angles e1 and e2


Let e1 = 180-y
let e2 = 180-60°

e2 = 120°

So e1 = 900 - (160+120+115+110+125+115)

e1 = 155°

Since e1 = 180 -y
155 = 180-y

y = 180 - 155

y = 25°

x = 180-110

x = 70°


F)  Sum of angles in an Octagon is 1080°

To solve for x, we must realize all internal angles.
Let call the missing angle between x and x+25 e1; and

the one between 135° and (x-5) e2 and
the one between x+25 and 140 e3


e1 = 180-25 = 155°
e2 = 155°

e3 = 180-20=60°

to find x:

1080 = (x+25) + 60 + 140 + (x-5)+155+135+155+x)

collect like terms

1080 - 60 - 155- 155-140-25+5 -135 = x + x + x
415 = 3x
x = 415/3
x = 138.33°

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Which point lies on the circle x2+y2=5?

Answers

The points that lie on the circle x² + y² = 5 are all the points that are at a distance of √5 from the origin (0,0). There are infinitely many points that lie on this circle, but some of the most common ones are (√5,0), (-√5,0), (0,√5), and (0,-√5).

In monitoring lead in the air after the explosion at the battery factory, it is found that the amounts of lead over a 37 day period had a sample standard deviation of 190. Find the margin of error that corresponds to a 93.6% confidence interval. (Round to 2 decimal places)

Answers

The margin of error that corresponds to 93.6% confidence interval is [tex]1.85 * (190 / \sqrt{(n)})[/tex].

To find the margin of error that corresponds to a 93.6% confidence interval, we need to first determine the critical value using a t-distribution table. Since the sample size is not given in the question, we can assume it is large enough to use a t-distribution instead of a z-distribution.

Using a t-distribution table with a degrees of freedom of n-1 (where n is the sample size), we can find the critical value for a 93.6% confidence interval with a two-tailed test. The corresponding t-value is approximately 1.85.

Next, we can use the formula for margin of error:

Margin of error = Critical value * (Sample standard deviation / sqrt(n))

Plugging in the values given in the question, we get:

Margin of error =[tex]1.85 * (190 / \sqrt{(n)})[/tex]

Since the sample size is not given in the question, we cannot calculate the exact margin of error. However, we can see that the margin of error will decrease as the sample size increases.

In general, the margin of error represents the range of values within which we can be reasonably confident that the true population mean lies. A larger margin of error indicates less precision in our estimate of the population mean. A confidence level of 93.6% means that if we were to repeat the sampling process multiple times, we can expect the true population mean to fall within our calculated interval 93.6% of the time.

Overall, the margin of error is an important concept in statistics as it helps us understand the level of uncertainty associated with our estimates of population parameters.

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A college plans to interview 10 students for possible offer of graduate assistantships. The college has 5 assistantships of different value available. How many ways can the assistantships be awarded

Answers

There are a total of 5 graduate assistantships available to be awarded to the 10 students who will be interviewed by the college. The number of ways that the assistantships can be awarded is determined by using the formula for combinations, which is:

nCr = n! / r! * (n - r)!

where n is the total number of items, r is the number of items being chosen, and ! denotes factorial, which means the product of all positive integers up to and including the given number.

In this case, we have:

n = 10 (number of students being interviewed)
r = 5 (number of assistantships available)

Using the formula, we can calculate the number of ways that the assistantships can be awarded as:

10C5 = 10! / 5! * (10 - 5)! = 252

Therefore, there are 252 ways that the assistantships can be awarded to the 10 students being interviewed by the college.

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The population of a particular type of bacteria is known to triple in 16 days. What is the daily growth rate, rounded to the nearest tenth of a percent

Answers

The daily growth rate of the bacteria, rounded to the nearest tenth of a percent is approximately 7.2% .

The population of a particular type of bacteria triples in 16 days, and we need to find the daily growth rate rounded to the nearest tenth of a percent.

To find the daily growth rate, we can use the formula for exponential growth:

Final Population = Initial Population * [tex](1 + Growth Rate)^{Number of Days}[/tex]

Since the population triples, the final population is 3 times the initial population. Let's denote the growth rate as 'r' and plug the given information into the formula:

3 * Initial Population = Initial Population * [tex](1+r)^{16}[/tex]

Divide both sides by the initial population:

3 = [tex](1+r)^{16}[/tex]

Now, we need to find the 16th root of 3 to get (1 + r):

(1 + r) = [tex]3^{1/16}[/tex]

Next, subtract 1 from both sides to find the growth rate:

r = [tex]3^{1/16}[/tex] - 1

Calculate the value of r and multiply by 100 to get the percentage:

r ≈ (1.07177 - 1) * 100 ≈ 7.2%

The daily growth rate of the bacteria is approximately 7.2%, rounded to the nearest tenth of a percent. This means that the bacteria population increases by about 7.2% every day for 16 days, resulting in a tripling of the population.

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grog writes every possible arrangement of the digits 2,4,6 with a decimal point between two digits Find the sum of every number less than 4.4 than grogg writes

Answers

First, let's list all the possible arrangements of the digits 2, 4, and 6 with a decimal point between two digits: - 2.4.6
- 2.6.4
- 4.2.6
- 4.6.2
- 6.2.4
- 6.4.2



Now, we need to find the sum of every number less than 4.4 than grogg writes. This means we need to add up all the numbers that are less than 4.4 and are also less than each of the six numbers on our list.

Let's start with the first number on our list, 2.4.6. The numbers that are less than 4.4 and less than 2.4.6 are:

- 2.4
- 2.6


So we add those two numbers together:  2.4 + 2.6 = 5, That's the sum for the first number on our list. Now we can repeat this process for each of the other five numbers on our list, and add up all the sums at the end. For 2.6.4, the numbers less than 4.4 and less than 2.6.4 are: - 2.6 .



So the sum for 2.6.4 is:  2.6, For 4.2.6, the numbers less than 4.4 and less than 4.2.6 are:
- 4.2
- 4.6, So the sum for 4.2.6 is: 4.2 + 4.6 = 8.8, For 4.6.2, the numbers less than 4.4 and less than 4.6.2 are:
- 4.2
- 4.6



So the sum for 4.6.2 is:
4.2 + 4.6 = 8.8

For 6.2.4, the numbers less than 4.4 and less than 6.2.4 are:

- None

There are no numbers less than 4.4 and less than 6.2.4, so the sum for 6.2.4 is 0.
Finally, for 6.4.2, the numbers less than 4.4 and less than 6.4.2 are:
- None

Again, there are no numbers less than 4.4 and less than 6.4.2, so the sum for 6.4.2 is 0.
Now we can add up all the sums:  5 + 2.6 + 8.8 + 8.8 + 0 + 0 = 25.2

So the sum of every number less than 4.4 than grogg writes is 25.2.


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