Answer:
2.33 Seconds
Step-by-step explanation:
The equation y = -6t^2 - 10t + 56 expresses the height of a ball at a given time, t, on the planet Mars. We are also given that the ball is thrown with a velocity of 10 feet per second with the initial height of 56 feet.
To find the amount of time to reach the ground, we can say that the time being found will be when the ball is on the ground, or when y = 0. So we simply set our equation to 0 and solve for t.
y = -6t^2 - 10t + 56
0 = -6t^2 - 10t + 56
0 = -1 (6t^2 + 10t + -56)
0 = -1 (3t - 7) (2t + 8)
(3t - 7) = 0 OR (2t + 8) = 0
3t = 7 OR 2t = -8
t = 7/3 OR t = -4
Since time will not be negative, we will want to choose the positive solution for this quadratic equation.
Hence, the amount of time for the ball to hit the ground will be 7/3 seconds or 2.33 seconds.
Cheers.
Answer:
2.33
Step-by-step explanation:
Setting $y$ to zero, we find the following:
\begin{align*}
-6t^2 - 10t + 56 &= 0 \\
\Rightarrow \quad 6t^2 + 10t - 56 &= 0 \\
\Rightarrow \quad 3t^2 + 5t - 28 &= 0 \\
\Rightarrow \quad (3t-7)(t+4) &= 0.
\end{align*}As $t$ must be positive, we can see that $t = \frac{7}{3} \approx \boxed{2.33}.$
A refrigerator is priced at 525.50 there is a 7% sales tax rate
Answer:
562.29
Step-by-step explanation:
you would just multiply 525.50 by 7 which is 3678.5 and divide that by 100 which is 36.785 and add that to 525.50 which is 562.285 which can be rounded to 562.29
cual de estos tipos de mentalidad puede contribuir a superar situaciones de no inclusión porque
La mentalidad de crecimiento, ya que a diferencia de la mentalidad fija, nos permite ver en otras personas la mentalidad de mejorar y perseverar.
If the side of an equatorial triangle is L then express the perimeter of the triangle in terms of L.
Answer:
3L
Step-by-step explanation:
Perimeter is the sum of side lengths
Since the triangle is equilateral, it has all sides equal and each has length of L
So perimeter is:
P= L+L+L = 3LYou need to construct an open-top rectangular box with a square base that must hold a volume of exactly 475 cm3. The material for the base of the box costs 8 cents/cm2 and the material for the sides of the box costs 6 cents/cm2. The dimensions for a box that will minimize the cost of the materials used to construct box are:
Answer:
The dimensions of the box are:
x = 8,93 cm and h = 5,95 cm
C(min) = 850,69 cents
Step-by-step explanation:
The volume of the box is:
V = x²*h where x is the side of the square base and h the height
then h = V/ x² ⇒ h = 475 / x²
The total cost of box C is:
C = C₁ + 4*C₂ Where C₁ and C₂ are the costs of the base and one lateral side respectevily
Then cost C = 8*x² + 4* 6*h*x
The cost C as a function of x is
C(x) = 8*x² + (24* 475 /x² )*x
C(x) = 8*x² + 11400/x
Tacking derivatives on both sides of the equation
C´(x) = 16*x - 11400/x²
C´(x) = 0 ⇒ 16*x - 11400/x² = 0
16*x³ = 11400 ⇒ x³ = 11400/16
x³ = 712,5
x = 8,93 cm
and h = 475 / (8,93)² ⇒ h = 5,95 cm
C(min) = 8*79,77 + 4* ( 8,93)*5,95
C(min) = 638,16 + 212,53
C(min) = 850,69 cents
To check if value x = 8,93 would make C(x) minimum we go to the second derivatives
C´´(x) = 16 + 22800/x³ > 0
Then we have a minimum of C at x = 8,93
The temperature on Monday was 5 Degrees. The temperature on Thursday was - 8 degrees. Was the overall change in the temperature positive, negative, or 0? Why ? *
Answer:
Negative change
Step-by-step explanation:
Given
[tex]Monday\ Temperature = 5\ deg[/tex]
[tex]Thursday\ Temperature = -8\ deg[/tex]
First, we need to calculate the overall change in temperature
This is calculated by subtracting the initial temperature from the final temperature
[tex]Overall\ Change = Thursday\ Temperature - Monday\ Temperature[/tex]
[tex]Overall\ Change = -8\ deg - 5\ deg[/tex]
[tex]Overall\ Change = -13\ deg[/tex]
The overall change shows a negative change in the temperature.
This is as a result of a drop in temperature from Monday to Thursday
Only a very small (<5) percentage of measurements can be more than 2 standard deviations from the mean of the normal distribution.
A. True
B. False
Answer:
A. True
Step-by-step explanation:
The empirical rule in statistics states that:
68% of the data will be within 1 standard deviation95% of the data will be within 2 standard deviations99.7% of the data will be within 3 standard deviationsSo yes, we can state that 5% or less of the data will be more than 2 standard deviations away from the mean. Of course, statistics is not 100% certain, so this rule is not 100% right all the time. Some exceptions might result, but generally speaking, the results should follow the empirical rule.
Answer:
The answer is true
Step-by-step explanation:
True
what is the biggest galaxy in the universe
Consider a group of students playing a game of tug-of-war, in which two teams pull on a rope to find which team is strongest. Each of the statements that follows describes what happens during the tug-of-war. Evaluate each statement and select the statements that are accurate.
suppose a certain brand of smoke detector functions properly 85 percent of the time. i installed 3 of thse in my room, what is probability that at least one of the three smoke detectors functions propoerly
Answer:
The probability that at least one of the three smoke detectors functions properly = 0.996625
Step-by-step explanation:
Given that:
a certain brand of smoke detector functions properly 85 percent of the time
Let X represent the certain brand of smoke detector
X = 85%
X = 0.85
Let the probability that at least one of the three smoke detectors functions properly be P(Y)
P(Y) = 1- (1 - X)³
P(Y) =1 - (1 - 0.85)³
P(Y) = 1 - 0.003375
P(Y) = 0.996625
∴
The probability that at least one of the three smoke detectors functions properly = 0.996625
the sides of an angle are
Answer:
the vetrex
Step-by-step explanation:
Are the points B, F, and W coplanar?
Answer:
yes
Step-by-step explanation:
Because the point lie on the plane they are coplanar
Solve the following equation algebraically
Answer:
the right answer is d
Step-by-step explanation:
please give 5 star i need it
Given the true/false statements are true (facts), select the best logical induction made from thoses statements: Mo likes oranges, jai likes oranges, Ben like oranges.
Answer:
People like oranges
Step-by-step explanation:
Given:
Mo likes oranges. Jai likes oranges. Ben likes oranges.
We have a few different options;
Option A: People don't like other fruit, such as apples. This can't be possible because we have only been given people who like oranges.
Option B: People on like oranges. This can't be possible because only is the case where people do not like any fruit except oranges, and we are not sure of this.
Option C: People like oranges. This can be possible because Mo, Jai, and Ben likes oranges
Option D: People like fruit. This can't be possible because we are not sure if people like all fruits or not
People like oranges.
What is Induction?the action or process of inducting someone to a position or organization.
How to determine?We have a few different options;
Option A: People don't like other fruit, such as apples. This can't be possible because we have only been given to people who like oranges.
Option B: People like oranges. This can't be possible because only is the case where people do not like any fruit except oranges, and we are not sure of this.
Option C: People like oranges. This can be possible because Mo, Jai, and Ben like oranges
Option D: People like fruit. This can't be possible because we are not sure if people like all fruits or not
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Multiply
11 x 34.12
I’m so confused?
Answer:
[tex]34.12 * 11 = 375.32[/tex]
Step-by-step explanation:
Given
11 * 34.12
Required
Multiply
To start with, we have to ignore the decimal points;
So, we have
3412
* 11
---------------
3 4 1 2
3 4 1 2
------------------------
3 7 5 3 2
The next step is as follows;
34.12 is in 2 decimal places
11 is has no decimal (0 decimal place)
Add the decimal places together
[tex]Decimal\ Place = 2 + 0 = 2[/tex]
This implies that the result will be in 2 decimal placed;
Hence:
[tex]34.12 * 11 = 375.32[/tex]
Use the given data to find the minimum sample size required to estimate a population proportion or percentage.
Margin of error 0.03: confidence level 95%; and unknown
Answer:
1067
Explanation:
The formula that will be used to calculate the sample size if population proportion isn't given is expressed as;
Sample size n = |Z|² × 0.25/E² where;
Z is the z-score at 95% confidence
E is the margin of error
Given parameters
Z score at 95% confidence interval = 1.96
E = 0.03
Substituting the given values into the formula to get the sample size n we will have;
n = 1.96²×0.25/0.03²
n = 3.8416×0.25/0.0009
n = 0.9604/0.0009
n = 1067.11
n ≈ 1067
Hence, the minimum sample size required to estimate a population proportion is approximately 1067
4x+y=10
( ,-6)
find the x value
please hellllpppp !!
Answer:
x=4
Step-by-step explanation:
4x+y=10
y=-6
4x-6=10
4x=16
x=4
(4,-6)
b-3+4b=34
Solve equation
Answer:
b = 7.4
Step-by-step explanation:
b - 3 + 4b = 34
combine like terms:
5b - 3 = 34
5b = 37
divide by 5:
b = 7.4
Answer:
b=7.4
Step-by-step explanation:
1. Combine like terms
5b-3=34
5b=37
2. Isolate x value by dividing
b=7.4
Damien worked at a grocery store earning $9.00 an hour. He worked 30 hours a week and was paid every two weeks. He paid $62 in taxes and had a $50 savings account deduction. How much were Damien's taxes and deductions?
Answer:
Answer: $428.00
Step-by-step explanation: First, we need to calculate the person’s total hours, (30 x 2 = 60 hours) then the money per hour (60 x 9) then take away the taxes and account deductions.
20 POINTSSSSSSSSSSS AND BRAINLIESTTTTTTTTTTTTTSSSSSSSSSSSSSS
Answer:
C
Step-by-step explanation:
Since the exponent on the 10 is negative, we need to move the decimal point to the left instead of the right. After moving the decimal point on the 2.5 to the left 4 places, we see that the answer is 0.00025.
2 What operation should be done first to solve 6x + 5 = 35?
o
Subtract 5
O Add 5
Multiply by 6
O Divide by 6
Answer:
subtract 5
Step-by-step explanation:
subtract 5 from each side of the equal sign..
Answer:
the answer is subtract 5
Step-by-step explanation:
i need help bad and fast
Answer: E) CD
Step-by-step explanation:
A segment with a slope of 0 on this graph represents a time where no distance is made, or a break. The only segment with a slope of 0(where distance does not increase) is segment CD.
Hope it helps <3
Answer:
CD
Step-by-step explanation:
CD is the answer because the graph becomes a flat line when a body is at rest
2. The cost of a pair of jeans was changed from $52 to $47.82. What was the percent change?
8% decrease
9% increase
9% decrease
8% increase
Answer:
I Think its 8% decrease
Answer:
The answer is
8% decreaseStep-by-step explanation:
To find the percentage change we use the formula
[tex]Percentage \: \: change = \frac{change}{original \: quantity} \times 100[/tex]
To find the change subtract the lesser one from the larger one
Original price = $ 52
Current price = $ 47.82
Change = 52 - 47.82 = $ 4.18
Substitute the values into the above formula
Percentage change is
[tex] \frac{4.18}{52} \times 100[/tex]
We have the final answer as
Percentage change = 8%
Since the current price was lesser than the original price there is a percentage decrease in the amount
Charmaine can knit 15 rows in 22 minutes. Create a ratio table and then estimate about how many full rows could she knit in 90 minutes?
Answer:
61 rows
Step-by-step explanation:
Set up a proportion:
[tex]\frac{15}{22}[/tex] = [tex]\frac{x}{90}[/tex]
Cross multiply:
22x = 1350
x = 61.36
= approx. 61 rows
Calculate the total installment price the carrying charges in the number of months needed to save them money at the monthly rate to buy the item below for its cash price the computer with the cash price of 750 offered on the installment plan for 39 per month for 24 months
Answer:
the total installment is $936 the carrying charges are $186 the monthly rate to buy the items are 19.23 or 20 monthsStep-by-step explanation:
$39 for 24 months comes to ...
$39 × 24 = $936
The "carrying charges" are the difference between the cash price and the installment price:
$936 -750 = $186
Saving at the rate of $39 per month, it would take ...
$750/$39 = 19.23 months about 20 months to save up the cash price.
Often, such savings would come from a once-a-month paycheck, so it would take more than 19 such paychecks to save the required amount.
hope it will help :)
What is the ratio of 2 feet to 4 yards?
Answer:
1:6
Step-by-step explanation:
1 yard = 3 feet. 4 yards = 12 feet.
Ratio of 2 feet:12 feet = 1:6 Ans D
The ratio of 2 feet to 4 yards is 1 : 6
How to determine the ratio?The ratio is given as:
Ratio = 2 feet : 4 yards
Convert yard to feet
Ratio = 2 feet : 4 * 3 feet
Evaluate
Ratio = 2 feet : 12 feet
Divide the ratio
Ratio = 1 : 6
Hence, the ratio of 2 feet to 4 yards is 1 : 6
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17.
An urn contains eight red, six white, and four green balls. Four balls are drawn at random.
(a) Compute P(all four are red).
(b) Compute P(exactly two are red and exactly two are green).
(c) Compute P(exactly two are red or exactly two are green).
(a) The probability that all four balls are red is
(Type an integer or a decimal. Round to two decimal places as needed.)
(b) The probability that there are exactly two red balls and exactly two green balls is
(Type an integer or a decimal. Round to two decimal places as needed.)
(c) The probability that there are exactly two red balls or exactly two green balls is
(Type an integer or a decimal. Round to two decimal places as needed.)
Complete Question
An urn contains eight red, six white, and four green balls. Four balls are drawn at random.
(a) The probability that all four balls are red is
(Type an integer or a decimal. Round to two decimal places as needed.)
(b) The probability that there are exactly two red balls and exactly two green balls is
(Type an integer or a decimal. Round to two decimal places as needed.)
(c) The probability that there are exactly two red balls or exactly two green balls is
Answer:
(a) The probability that all four balls are red is
0.023
(b) The probability that there are exactly two red balls and exactly two green balls is
0.055
(c) The probability that there are exactly two red balls or exactly two green balls is
1.398
Step-by-step explanation:
An urn contains
Red balls = 8
White balls = 6
Green balls = 4
Total number of balls = 18 balls
(a) The probability that all four balls are red is?
The probability that a ball drawn is red = 8/18
The probability of drawing a ball that is not red = 1 - 8/18 = 10/18
The probability that all the 4 balls drawn are red = 8/18 × 7/17 × 6/16 x 5/15
= 1680/73440
= 0.022875817
Approximately = 0.023
(b) The probability that there are exactly two red balls and exactly two green balls is
There are 6 ways by which this can be achieved. Where R = Red balls and G = Green Balls
RRGG
GGRR
RGRG
GRGR
RGGR
GRRG
P(Exactly two red balls and two green balls) = P(Exactly two red balls × Exactly two green balls)
=[ (8/18 × 7/17) ×( 4/16 × 3/15)] × 6 ways
= 672/73440 × 6 ways
= 0.0091503268 × 6 ways
= 0.0549019608
Probability of drawing out exactly two two red balls and two green balls is
= 0.055
(c) The probability that there are exactly two red balls or exactly two green balls is
P(Exactly two red balls or two green balls) = P(Exactly two red balls + Exactly two green balls)
P(Exactly two red balls or two green balls) = P(Exactly two red balls or Exactly two green balls)
=[ (8/18 × 7/17) + ( 4/16 × 3/15)] × 6 ways
=0.1830065359 + 0.05
= 0.2330065359 × 6 ways
= 1.3980392154
≈1.398
A diagonal of a rectangle is 8cm and forms an angel measuring 30 with one side.Find the area of the rectangle.
Answer:
16 * √3 cm² or approximately 27.71 cm²
Step-by-step explanation:
Given the 8 cm length of the diagonal and the 30° (π/6 radians) angle with one of the sides, we can calculate the width and height of the rectangle using:
8 * cos(π/6) = 8 * ((√3)/2) = 4 * √3
8 * sin(π/6) = 8 * (1/2) = 4
Multiply those two values together to get the area and you get
16 * √3 cm²
Which type of transformation is shown?
Answer:
Translation
Step-by-step explanation:
The object is only moved, which is what happens when a translation occurs
The area of rectangular is 46 square inches.if the length is 4 times the width . Then find the dimensions of the rectangular
Answer:
the rectangle's width is approximately 3.39 inches
and the length is approximately 13.56 inches.
Step-by-step explanation:
Recall that the area of a rectangle is Length times Width
If we name the length "L" and the width "W", we have:
L * W = 46
Also: "the length is 4 times the width" can be written in math form as:
L = 4 * W
and now we can replace the length L by 4 * W in the formula for the area:
[tex]L\,*\,W = 46\\(4\,W) \,W = 46\\4\,W^2=46\\W^2=\frac{46}{4} =11.5\\W=\sqrt{11.5} \\W\approx 3.39[/tex]
and now we find the value of L:
[tex]L=4\.(3.39) = 13.56[/tex]
Therefore, the rectangle's width is approximately 3.39 inches
and the length is approximately 13.56 inches.
The density of an object has the equation d = m/v. If an object has a mass of 20 g and a volume of 3.5 cm^3, what is its density?
Answer:
[tex]\Large \boxed{\mathrm{5.71 \ g/cm^3 }}[/tex]
Step-by-step explanation:
[tex]\sf \displaystyle density = \frac{mass}{volume}[/tex]
[tex]\displaystyle \rho = \frac{m}{V}[/tex]
[tex]\sf Mass \rightarrow 20 \ g \\ Volume \rightarrow 3.5 \ cm^3[/tex]
[tex]\displaystyle \rho = \frac{20}{3.5}[/tex]
[tex]\rho \approx 5.71[/tex]
Density is defined as the mass per unit volume of an object and It is calculated using the equation: density (d) = mass (m) / volume (v).
In this scenario, the mass of the object is given as 20 grams and the volume is given as 3.5 cm^3. To find the density, we can substitute these values into the equation: density =[tex]20 g / 3.5[/tex] cm^3 To simplify the unit of the measurement, we can convert cm^3 to mL (since 1 cm^3 is equal to 1 mL).
Thus, the equation becomes: density = [tex]20 g / 3.5[/tex] mL Calculating the division: density ≈ 5.71 g/mL Therefore, the density of the object is approximately 5.71 g/mL.
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