a) Sample size if the lower control limit is to be nonzero: 50
b) Sample size if the probability of detecting a shift to 0.04 is to be 0.50: 100
a) How large should the sample size be if the lower control limit is to be nonzero?
n = (2σ / d)²We know that:
Center line (CL) = 0.01
Sigma (σ) = LCL = 0.005
d = Centerline - LCL = 0.01 - 0.005 = 0.005
Substituting the values in the formula, we get
n = (2 * 0.005 / 0.01)²= 50 Hence, if the lower control limit is to be nonzero, the sample size should be 50.
b) How large should the sample size be if we wish the probability of detecting a shift to 0.04 to be 0.50?
The probability of detecting a shift to 0.04 is denoted by β and is calculated using the following formula:
β = Φ [(-Zα/2 + Zβ) / √ (p₀q₀/n)], Where, Φ is the standard normal distribution function, Zα/2 is the critical value for the normal distribution at the (α/2)th percentile, Zβ is the critical value for the normal distribution at the βth percentile, p₀ is the assumed proportion of nonconforming items, q₀ is 1 – p₀, and n is the sample size.
In order to determine the sample size, we must first select a value for β. If we select a value for β of 0.50, then β = 0.50. This implies that we have a 50% chance of detecting a shift if one occurs. Since the exact value for p₀ is unknown, we assume that p₀ = 0.01, which is equal to the center line.
n = (Zα/2 + Zβ)² p₀q₀ / β², Substituting the values in the formula, we get,
n = (Zα/2 + Zβ)² p₀q₀ / β²= (1.96 + 0.674)² (0.01) (0.99) / 0.50²= 99.7 ≈ 100
Hence, if we wish the probability of detecting a shift to 0.04 to be 0.50, the sample size should be 100.
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The length in inches of each side of a square is given by the expression x + 2. the area of the square can be represented by (x + 2)2−16=0 when the area is 16 square inches. what is the value of x?
The value of x is 2 inches, which represents the length of each side of the square.
We can start by setting up the equation using the given expression for the side length and the given area:
(x + 2)² - 16 = 0
Expanding the left side and simplifying, we get:
x² + 4x = 0
Factoring out x, we get:
x(x + 4) = 0
So, either x = 0 or x = -4. However, since x represents a length, it must be positive. Therefore, the only solution is:
x = 0 + 2 = 2
So the value of x is 2 inches.
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C. Use Structure Why might Tavon have chosen
to multiply both sides of the equation by 10?
Could he have used another number? Explain.
By answering the presented question, we may conclude that In general, expressions it is often most convenient to choose numbers that are powers of ten.
what is expression ?In mathematics, an expression is a collection of integers, variables, and complex mathematical (such as arithmetic, subtraction, multiplication, division, multiplications, and so on) that describes a quantity or value. Phrases can be simple, such as "3 + 4," or complicated, such as They may also contain functions like "sin(x)" or "log(y)". Expressions can be evaluated by swapping the variables with their values and performing the arithmetic operations in the order specified. If x = 2, for example, the formula "3x + 5" equals 3(2) + 5 = 11. Expressions are commonly used in mathematics to describe real-world situations, construct equations, and simplify complicated mathematical topics.
Tavon may have chosen to multiply both sides of the equation by 10 because he wanted to remove the decimal point and work with integers. Then he can use his knowledge of integer multiplication and division to solve the equations more easily.
Tavon may have used a different number and removed the decimal point. For example, you could multiply both sides by 100 or 1000 instead of 10. However, you should carefully choose a number that is manageable and does not overcomplicate the problem. Multiplying by larger numbers complicates the calculations, and multiplying by smaller ones does not eliminate the decimal point entirely. In general, it is often most convenient to choose numbers that are powers of ten.
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There is a 0.99962 probability that a randomly selected 28-year-old female lives through the year. An insurance company wants to offer her a one-year policy with a death benefit of $500,000. How much should the company charge for this policy if it wants an expected return of $400 from all similar policies?
In order to expect a return on $400 from across all policies of a similar nature, the insurance firm should charge the policy for about $501.88.
How then do we return a value?Return[expr] leaves control structures that are present during a function's definition and returns the value expression for the entire function. Even if it comes inside other functions, yield takes effect as quickly as it is evaluated. Functions like Scan can use Return inside of them.
Since p is the chance that the 28-year-old woman survives the year and is given as 0.99962, we can enter this number into the equation for n as follows: n = 400(0.99962)/500,400 n 0.799
In light of this, the insurance provider should impose a premium of: Premium = 400/n
$501.88 is the premium ($Premium = 400/0.799)
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You spin the spinner twice the numbers are 5,4,6. What is the probability of landing on a number greater than 4 and then landing on a number less than 6
Answer:
Step-by-step explanation:
The probability of landing on a number greater than 4 on the first spin is 2/3, because 2 out of the 3 numbers (5, 4, 6) are greater than 4.
If the first spin lands on a number greater than 4, then there are two numbers left (4 and 5) for the second spin. The probability of landing on a number less than 6 on the second spin is 2/2 or simply 1, because both 4 and 5 are less than 6.
Therefore, the probability of landing on a number greater than 4 on the first spin and a number less than 6 on the second spin is:
(2/3) x (1) = 2/3 or approximately 0.67.
g in the aftermath of a car accident, it is concluded that one driver slowed to a halt in 19 seconds while skidding 1700 feet. if the speed limit was 60 miles per hour, can it be proved that the driver had been speeding? (hint: 60 miles per hour is equal to 88 feet per second.) we can guarantee that at some time from when the driver first pressed on the brake to when the car came to a complete stop the car was traveling mph. therefore we (can/can not) conclude that the driver was speeding from the information given.
Yes, it can be proved that the driver had been speeding.
The driver had been speeding since the distance traveled during the 19-second skid is greater than the distance the car would have traveled at 60 mph in the same time. This implies that the driver was traveling at a higher speed than the speed limit before braking.
To explain further, we can calculate the distance a car traveling at 60 mph would cover in 19 seconds, which is 1,672 feet (60 mph = 88 fps, 19 seconds x 88 fps = 1,672 feet). However, the car in question skidded for 1700 feet before coming to a complete stop, which is greater than the distance it would have traveled at 60 mph in the same time. This implies that the driver was traveling at a higher speed than the speed limit before braking. Therefore, it can be concluded that the driver was speeding.
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Suppose that s is the position function of an object, given as s(t) = 2t - 7. We compute the instantaneous velocity of the object at t = 6 as follows. Use exact values. First we compute and simplify (6 +h). s(6 + h) = Then we compute and simplify the average velocity of the object between t = 6 and t = 6 + h. 8(6+h) - s(6) h = Rationalize the numerator in the average velocity. (If it applies, simplify again.) $(6 + h) - $(6) h The instantaneous velocity of the object att = 6 is the limit of the average velocity as h approaches zero. s(6 + h) – $(6) v(6) lim h -0
The instantaneous velocity of the object at t = 6 is 2.
Suppose that s is the position function of an object, given as s(t) = 2t - 7. We compute the instantaneous velocity of the object at t = 6 as follows. Use exact values. First we compute and simplify (6 + h). s(6 + h) = 2(6 + h) - 7 = 12 + 2h - 7 = 2h + 5Then we compute and simplify the average velocity of the object between t = 6 and t = 6 + h.8(6+h) - s(6) h = 8(6 + h) - (2(6) - 7) h= 8h + 56
Then, to rationalize the numerator in the average velocity. (If it applies, simplify again.)$(6 + h) - $(6) h(h(h) + 56)/(h(h)) = (8h + 56)/h The instantaneous velocity of the object att = 6 is the limit of the average velocity as h approaches zero.s(6 + h) – $(6) v(6) lim h -0s(6 + h) – s(6) v(6) lim h -0Using the above calculation, we get:s(6 + h) – s(6) / h lim h -0s(6 + h) = 2(6 + h) - 7 = 2h + 5So,s(6 + h) – s(6) / h lim h -0(2h + 5 - (2(6) - 7)) / h= (2h + 5 - 5) / h = (2h / h) = 2
Therefore, the instantaneous velocity of the object at t = 6 is 2.
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lincoln, cpa, selected a sample of 100 items by dividing the population of 100,000 sales invoices by 100. with a random start, she then selected every 1,000th invoice. this selection process is referred to as:
This selection process is referred to as "systematic sampling"
Systematic sampling is the sampling method where samples are selected based on a systematic interval in a population. It is a type of probability sampling, where every kth element in the population is selected as a sample, where k is a constant value.
The interval k is calculated by dividing the population size N by the sample size n; hence, k = N/n. In this case, the sample size is 100, and the population size is 100,000, so the interval is k = 1000. The selection process involved in this question is an example of systematic sampling because the selection of the 100 sales invoices is based on a systematic interval of 1000. Starting at a random point, every, 1000th sale invoice is selected until 100 are chosen.
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URGENT HELP PLEASE I NEED THE WORK FOR IT TOO
The value of the x is equal to 7 using the secant tangent angle formula.
What is the secant tangent angleThe secant tangent angle is the angle formed by a tangent and a secant that intersect outside of a circle. The measure of the secant tangent angle can be found using the following formula:
θ = 1/2 (arc EB - arc BD)
where arc EB and arc BD are the measures of the arcs intercepted by the secant and tangent, respectively.
From the question,
θ = m∠NXK = 4x + 6
arc EB = 8x - 13
arc BD = 70° + (6x - 1) = 69 + 6x
4x + 6 = 1/2[69 + 6x - (8x - 13)]
4x + 6 = 1/2(69 + 6x - 8x + 13)
4x + 6 = 1/2(82 - 2x)
4x + 6 = 41 - x
4x + x = 41 - 6 {collect like terms}
5x = 35
x = 35/5 {divide through by 5}
x = 7
Therefore, the value of the x is equal to 7 using the secant tangent angle formula.
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What is an equation for the quadratic function represented by the table shown?
(0,-1),(2,3),(4,-1),(6,-13)
The equation of the quadratic function represented by the given table is y = -x² + 4x - 7.
What is a quadratic function?A quadratic function is a function of the form:\sf(x) = ax^2 + bx + c\swhere a, b, and c are constants and x is the parameter. The graph of a quadratic function is a parabola, which is an Inverted curve. Whether the parabola opens up (if a > 0) or down (if a 0) depends on the sign of the coefficient a.
The width of the parabola is also determined by the coefficient a. The parabola is narrow if |a| is greater than 1. (i.e. it has a small width relative to its height). The parabola is wide if |a| is greater than 1.
The standard form of the quadratic equation is given as:
y = ax² + bx + c
Substitute the value of x and y from the table:
3 = a(2)² + b(2) + c
4a + 2b + c = 3........(1)
For point (4, -1):
-1 = a(4)² + b(4) + c
16a + 4b + c = -1..........(2)
For (6, -13):
-13 = a(6)² + b(6) + c
36a + 6b + c = -13..........(3)
From 1 we have:
c = 3 - 4a - 2b
Substitute the value of c in equation 2 and 3:
16a + 4b + 3 - 4a - 2b = - 1
12a + 2b = - 4........(4)
36a + 6b + 3 - 4a - 2b = -13
32a + 4b = -16.......(5)
Multiply equation 4 with 2 and subtract with equation 5:
32a + 4b = -16
-(24a + 4b = - 8)
a = -1
Substitute the value of a in equation 5:
32(-1) + 4b = -16
-32 + 4b = -16
b = 4
Substitute the value of a and b in equation 1:
16a + 4b + c = -1
16(-1) + 4(4) + c = -1
-16 + 8 + c = -1
-8 + c = -1
c = 7
Using the algebraic techniques we have:
a = -1
b = 4
c = 7
Hence, the equation of the quadratic function represented by the given table is y = -x² + 4x - 7.
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Sandesh sold 15kgs of apples for 2100rs and gained 12%. At what price per kg should he sell to gain 20% ?
As per the given percentage, Sandesh should aim to sell his apples at 250rs per kg in order to gain 20% profit.
Let C be the cost of the 15kgs of apples. Sandesh gained 12%, so his profit is 0.12C. We know that Sandesh sold the apples for 2100rs, so we can write an equation:
C + 0.12C = 2100
Simplifying this equation gives:
1.12C = 2100
Dividing both sides by 1.12 gives:
C = 1875
So Sandesh's cost for 15kgs of apples was 1875rs.
Now, we need to find the selling price per kg of apples that Sandesh should aim for in order to gain 20% profit. Let P be the selling price per kg of apples.
Since Sandesh wants to gain 20% profit, his selling price per kg of apples needs to be his cost plus 20% of his cost, or 1.2 times his cost.
So we can write another equation:
1.2C = 15P
Substituting the value of C we found earlier, we get:
1.2(1875) = 15P
Simplifying gives:
P = 250
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The measure of angle c is (4x-24. 6) and measure of angle d is (x+11. 3). If the angles are supplementary, find the value of x and measure of angle d
The measurement of of angle c is (4x-24. 6) and measure of angle d is (x+11. 3). If the angles are supplementary, the value of x is 38.66.
The measure of angle c is (4x-24. 6)
The measure of angle d is (x+11. 3)
If both angles are supplementary angles then,
angle c + angle d = 180
(4x-24. 6) + (x+11. 3) = 180
5x - 13.3 = 180
5x = 180 + 13.3
5x = 193.3
x = 193.3/5
x = 38.66
So, the value of x is 38.66
What distinguishes complimentary from supplementary angles?
Two angles are said to be supplementary angles because they combine to generate a linear angle when their sum is 180 degrees. When two angles add up to 90 degrees, however, they are said to be complimentary angles and together they make a right angle.
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a circle is centered at the vertex of an angle, and the angle's rays subtend an arc that is 103.25 cm long. 1/360th of the circumference of the circle is 0.59 cm long. what is the measure of this angle in degrees?
The measure of this angle in degrees is 20.52 degrees.
Step by step explanation:Given data is,1/360th of the circumference of the circle is 0.59 cm long Arc length, s = 103.25 cm We need to find the measure of the angle in degrees. Since we know that, the angle subtended by an arc at the center of the circle is 2θ, where θ is the angle subtended by the arc at any point on the circumference of the circle.And the circumference of the circle is 360θ.
Hence, we can find the length of the circumference of the circle. Circumference of the circle = 360 × 0.59Circumference of the circle = 212.4 cmNow, we can find the radius of the circle.r = s/2πr = 103.25/(2 × π) = 16.441 cmDiameter of the circle = 2 × rDiameter of the circle = 32.882 cmThe circumference of the circle = πdCircumference of the circle = π × 32.882Circumference of the circle = 103.26 cm Now, we can find the angle of the circle. Angle of the circle = 360θ103.26 = 360θθ = 103.26/360θ = 0.286 degrees So, the measure of this angle in degrees is 20.52 degrees.
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what is the implication when the determinant of a matrix is almost 0 and how does this affect the sensitivity of the solution to the change of constants in the system?
Answer:
When the determinant of a matrix is almost 0, it means that the matrix is close to being singular, which means that its inverse does not exist or is very close to not existing. This has important implications for the solution of systems of linear equations represented by the matrix.
Specifically, if the determinant of a matrix is almost 0, then the matrix is almost singular, which means that its columns are almost linearly dependent. This, in turn, means that the system of equations represented by the matrix has almost linearly dependent equations, which can lead to multiple solutions or no solutions at all.
In terms of the sensitivity of the solution to changes in the constants of the system, a small change in the constants can lead to a large change in the solution when the determinant of the matrix is almost 0. This is because the inverse of the matrix is very sensitive to changes in its entries when the determinant is almost 0.
For example, consider a system of linear equations represented by a matrix A with determinant very close to 0, and let b be the vector of constants on the right-hand side of the equations. Then, the solution to the system can be approximated by the product of the inverse of A (if it exists) and b, that is:
x = A^(-1) b
However, if A is almost singular, then its inverse is very sensitive to changes in its entries, and a small change in b can lead to a large change in x. This can make the solution to the system unreliable and unstable, and can be a source of numerical errors in computations.
Step-by-step explanation:
Colin invests £1200 into his bank account.
He receives 5% per year simple interest.
How much will Colin have after 3 years?
Give your answer to the nearest penny where appropriate.
[tex]~~~~~~ \textit{Simple Interest Earned Amount} \\\\ A=P(1+rt)\qquad \begin{cases} A=\textit{accumulated amount}\\ P=\textit{original amount deposited}\dotfill & \pounds 1200\\ r=rate\to 5\%\to \frac{5}{100}\dotfill &0.05\\ t=years\dotfill &3 \end{cases} \\\\\\ A = 1200[1+(0.05)(3)]\implies A=1200(1.15) \implies A = 1380[/tex]
Helppppp will give brainlyest
Answer: 4
Step-by-step explanation:
4. shift the boundary line up 1
To train for a race, Rosmaria runs 1.5 hours longer each week than she did the previous week. In the first week, Rosmaria ran 3
hours. How much time will Rosmaria spend running if she trains for 12 weeks?
first to answer with good explanation gets brainlest
In linear equation, 54 hours time will Rosmaria spend running if she trains for 12 week.
What is a linear equation in math?
An algebraic equation with simply a constant and a first-order (linear) term, such as y=mx+b, where m is the slope and b is the y-intercept, is known as a linear equation. Sometimes, the aforementioned is referred to as a "linear equation of two variables," where x and y are the variables.
Rosmaria runs 1.5 hours.
In the first week, Rosmaria ran 3 hours.
Rosmaria spend running if she trains for 12 weeks = 12 * 1.5 * 3
= 54
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Cindy rides her bike with a constant speed of 8 miles per hour how long will she take to a travel a distance of 2 miles
Cindy will take 0.25 hours or 15 minutes to travel a distance of 2 miles at a constant speed of 8 miles per hour.
What is the formula for Time?The formula for time is: time = distance / speed where "distance" is the distance traveled by an object, and "speed" is the rate at which the object is moving.This formula can be used to calculate the time taken by an object to travel a certain distance at a constant speed, or to calculate the speed or distance if the other two variables are known.
What is the formula for Speed?The formula for speed is: speed = distance / time where "distance" is the distance traveled by an object and "time" is the duration of travel.This formula can be used to calculate the speed of an object if the distance it has traveled and the time it took to travel that distance are known. It can also be used to calculate the distance traveled by an object if its speed and the time it traveled at that speed are known.
In the given question,
We can use the formula:
time = distance / speed
where "distance" is the distance traveled and "speed" is the speed at which Cindy is riding her bike.
Substituting the given values, we get:
time = 2 miles / 8 miles per hour
Simplifying, we get:time = 0.25 hours.
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Q4.
The diagram shows a regular hexagon OABCDE.
a
E
OA = a
AB = b
M is the midpoint of OE.
N is the midpoint of AB.
(a) Find MN in terms of a and/or b.
b
B
D
Diagram NOT
accurately drawn
By answering the presented question, we may conclude that So, the Pythagorean theorem length of MN is expressed in terms of a and b.
What is Pythagorean theorem?Its Pythagorean theorem is just a fundamental mathematical principle that explains the connection between the sides of a triangle that is right. It asserts that the sum of the squares of both the widths of the other two sides is a square of both the width of the hypotenuse (the side facing the perfect angle) the side opposite the right angle). The mathematical mathematics is as follows: c2 = a2 + b2 At which "c" indicates the length of the right triangle and "a" and "b" reflect the extents of the additional two sides, started referring to as the legs.
Because M is the midpoint of OE and N is the midpoint of AB, we can draw a line segment connecting M and N that is parallel to OB and AE and perpendicular to AB.
the Pythagorean theorem
[tex]OE² = OX² + XE²OE²[/tex]
[tex](a + b/2)² + (2a - b/√3)²OE² = 7a²/4 + 3ab/2 + b²/4AN²[/tex]
[tex]AE² + EN²AN² = (2a√3)² + (b/2)²AN²[/tex]
[tex]12a² + b²/4MN² = AN² + AM²MN² \\\\ 12a² + b²/4 + (7a²/4 + 3ab/2 + b²/4)MN²\\\\19a²/2 + 3ab/2 + b²/2MN = √(19a²/2 + 3ab/2 + b²/2)[/tex]
So, the length of MN is expressed in terms of a and b.
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7,600 dollars is placed in a savings account with an annual interest rate of 6%. If no money is added or removed from the account, which equation represents how much will be in the account after 7 years?
Answers:
M=7,600(1+0.06)(1+0.06)
M=7,600(1-0.06)^7
M=7,600(1+0.06)^7
M=7,600(0.06)^7
Step-by-step explanation:
The equation that represents how much will be in the account after 7 years is:
M = 7,600(1+0.06)^7
Here's the explanation:
The formula for calculating the future value (M) of a present value (P) invested at an annual interest rate (r) for a certain number of years (t) is M = P(1+r)^t.
In this case, the present value (P) is 7,600 dollars, the annual interest rate (r) is 6% or 0.06, and the number of years (t) is 7.
Substituting these values into the formula, we get M = 7,600(1+0.06)^7. This represents how much will be in the account after 7 years if no money is added or removed from the account.
Which expression is equivalent to 6(w+7)?
The expression that is equivalent to 6(w + 7) is 6w + 42.
What is an expression?An expression is a combination of numbers, variables, and mathematical operations (such as addition, subtraction, multiplication, and division) that are grouped together to represent a mathematical quantity or relationship.
What is distributive property?The distributive property is a property of multiplication that allows us to multiply a single term by a sum or difference of terms. It states that:
a(b + c) = ab + ac and a(b - c) = ab - ac.
In other words, we can distribute the factor a to each term within the parentheses by multiplying it by each term, and then add or subtract the resulting products.
In the given question,
To simplify the expression 6(w + 7), we can use the distributive property of multiplication over addition, which states that:
a(b + c) = ab + ac
Using this property, we can expand the expression 6(w + 7) as:
6w + 6(7)
Simplifying the second term by multiplying, we get:
6w + 42
Therefore, the expression that is equivalent to 6(w + 7) is 6w + 42.
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(x+2)^2=-16 This equation had no solution, why not?
[tex](x+2)^2=-16\implies x+2=\sqrt{-16}\implies x+2=\sqrt{-1\cdot 16} \\\\\\ x+2=\sqrt{-1}\cdot \sqrt{16}\implies x+2=4i[/tex]
so, whenever you take an "even root" of a "negative value", you'd end up with an imaginary root or value, which is another way to say, such root doesn't really exist or no solution.
now, we can look at it this way, the same equation is really just a parabola like (x+2)² + 16 = 0, notice, the parabola is in vertex form, its vertex is at (-2 , 16), on the II Quadrant 16 units up above the x-axis. A solution or what's called a solution or root or zero is really nothing but just an x-intercept, well, the parabola's vertex is way up and is opening upwards, so it never touches the x-axis, no zeros, no solution.
Check the picture below.
Here is a cylinder with height 4 units and diameter 10 units
The area of the cylinder's base is 25π square units. The volume of the cylinder is 100π cubic units.
a. The base of a cylinder is a circle. We can shade the circle at the bottom of the cylinder to represent the cylinder's base.
b. The diameter of the cylinder is 10 units, which means the radius of the base is half of that or 5 units. The area of a circle is calculated using the formula A = πr^2, where A is the area and r is the radius.
Therefore, the area of the cylinder's base is:
A = πr^2 = π(5^2) = 25π
So the area of the cylinder's base is 25π square units.
c. The volume of a cylinder is calculated using the formula V = πr^2h, where V is the volume, r is the radius of the base, and h is the height of the cylinder.
Substituting the values given, we get:
V = πr^2h = π(5^2)(4) = 100π
So the volume of the cylinder is 100π cubic units.
A cylinder is a three-dimensional object with a circular base and straight sides that rise to a circular top. The area of a cylinder is the total amount of space on the surface of the cylinder. It can be calculated by finding the sum of the areas of the two circular bases and the curved surface area in between.
The formula for finding the surface area of a cylinder is A = 2πr² + 2πrh, where "r" is the radius of the circular base, "h" is the height of the cylinder, and "π" is a constant value of approximately 3.14159. To calculate the area of a cylinder with a radius of "r" and height of "h", we first find the area of the circular base by using the formula for the area of a circle: A_base = πr².
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Complete Question: -
Here is a cylinder with height 4 units and diameter 10 units. a. Shade the cylinder’s base. b. What is the area of the cylinder’s base? Express your answer in terms of π. c. What is the volume of this cylinder? Express your answer in terms of π.
QUESTION 3
A pan of brownies is cut into eight equal rows. Two thirds of one of those rows is what fraction of the whole pan.
Answer:
1/12
Step-by-step explanation:
Each row would be 1/8 of the whole pan. Now multiply 1/8 by 2/3.
Multiply the numerators: 1*2=2
Multiply the denominators: 8*3=24
Your answer: 2/24 or 1/12 simplified (dividing both top and bottom by 2)
Hope this helps. :)
Answer:
[tex]\frac{1}{11}[/tex]
Step-by-step explanation:
[tex]\frac{2}{22}[/tex] = [tex]\frac{1}{11}[/tex]
I drew a pan when I divided into 8 rows. Then I divided that up inot 2/3. In the first row that is divided into 3 parts, I want one of those 2 parts. The total parts are 22. 2/22
Solve the following system of equations algebraically:x+y=7, x+2y=11
Answer:
(3, 4)
Step-by-step explanation:
Pre-SolvingWe are given the following system of equations:
x + y = 7
x + 2y = 11
We want to solve to find the values of x and y.
SolvingThere are three ways to solve a system of equations: substitution, graphing, and elimination.
Any one of these methods will work, however let's do elimination for this.
To eliminate, we can add or subtract the equations together to clear the variables.
It is helpful to rewrite this system as:
x + 2y = 11
x + y = 7
We can subtract x + y = 7 from x+2y=11:
x + 2y = 11
-(x+y = 7)
This is equivalent to:
x + 2y = 11
-x - y = - 7
_________
0 + y = 4
So, y = 4
Now, we need to find x.
We can plug in 4 for y in either x + y = 7 or x + 2y = 11.
Taking x + y =7 for instance:
x + 4 = 7
Subtract 4 from both sides.
x = 3
So, x = 3 and y =4
As a point, this is (3, 4).
Line A has a y-intercept of 3 and is perpendicular to the line given by
y = 5x + 2.
What is the equation of line A?
Give your answer in the form y = mx + c, where m and c are integers or
fractions in their simplest forms.
Answer:
Step-by-step explanation:
The given line is y = 5x + 2. We know that any line perpendicular to this line will have a slope that is negative reciprocal of 5. The negative reciprocal of 5 is -1/5.
Line A is perpendicular to y = 5x + 2, so it has a slope of -1/5. We also know that the y-intercept of line A is 3. Therefore, the equation of line A can be written as:
y = (-1/5)x + 3
or in the form y = mx + c, where m = -1/5 and c = 3.
Pls help!!!
Possible answers
Al m=5. L0=14, NO-12
B) m=7, 10= 14, NO= 14
C m=7, LO=12, NO= 12
D) m=4, L0=13, NO = 14
E) m=5, LO= 14, NO= 15
So the correct answer is option A) m=5, LO=14, NO-12 for the indicated variables and measures for the figure below.
What is triangle?A triangle is a closed two-dimensional geometric figure with three straight sides and three angles. It is one of the basic shapes in geometry and can be classified based on the length of its sides and the measures of its angles. The sum of the interior angles of a triangle is always 180 degrees, and the length of each side is less than the sum of the lengths of the other two sides. Triangles have many properties and are used in various mathematical and real-world applications, including trigonometry, geometry, and engineering.
Here,
Since all the angles are equal, we can set up the following proportion:
LO/NO = 7/2
Multiplying both sides by NO, we get:
LO = (7/2)NO
We can also use the fact that the angles are equal to set up an equation involving m:
m + (1/2)LO + (1/2)NO = 180
Substituting LO = (7/2)NO, we get:
m + (7/4)NO = 180
Now we can substitute the given values for LO and NO:
m + (7/4)(14) = 180
m + 49 = 180
m = 131
Therefore, the answer is: m = 131, LO = 49, NO = 14
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Jen’s assignment is to read at least 85 pages of a novel. Jen has read 31 pages. How many pages p does Jen have left to read? Write an inequality that represents this situation. Then solve the inequality
Jen has 54 pages left to read to meet her assignment requirement.
The inequality that represents this situation is p ≥ 85 - 31
To find how many pages Jen has left to read, we can subtract the number of pages she has already read from the minimum number of pages she needs to read.
The minimum number of pages Jen needs to read is 85, and she has already read 31 pages. So, the number of pages she has left to read, p, can be found by:
p = 85 - 31
p = 54
Therefore, Jen has 54 pages left to read.
To represent this situation with an inequality, we can use:
p ≥ 85 - 31
This inequality states that the number of pages Jen still needs to read, p, must be greater than or equal to the difference between the minimum number of pages she needs to read (85) and the number of pages she has already read (31).
Solving for p:
p ≥ 85 - 31
p ≥ 54
This means that Jen must read at least 54 more pages to meet her assignment requirement.
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What is the solution set of the equation (show work)
The solution set of the equation x/3 = 8/(x + 2) when calculated is x = -6 or x = 4
Calculating the solution set of the equationGiven the following equation
x/3 = 8/(x + 2)
Cross multiply
x(x + 2) = 24
To find the solution set of x(x + 2) = 24, we need to solve for x by simplifying the left-hand side of the equation and then factoring it.
x(x + 2) = 24
Expanding the left-hand side, we get:
x² + 2x = 24
Subtracting 24 from both sides, we get:
x² + 2x - 24 = 0
Now we can factor the quadratic expression on the left-hand side:
(x + 6)(x - 4) = 0
Using the zero product property, we know that the product of two factors is zero if and only if at least one of the factors is zero.
Therefore, we can set each factor equal to zero and solve for x:
x + 6 = 0 or x - 4 = 0
Solving for x, we get:
x = -6 or x = 4
So, the solution set is { -6, 4 }.
These are the values of x that make the equation true when plugged in.
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two similar sized potatoes start at 20 degrees celsius. one potato is placed in the oven at 200 degrees celsius. after ten minutes the baked potato is 37 degrees celsius. according to newton's equation, how long will it take for the potato to reach 90 degrees celsius to the nearest tenth of a minute?
The potato will take approximately 3.1 minutes to reach a temperature of 90 degrees Celsius to the nearest tenth of a minute.
What is the Newton's equation?According to Newton's equation, we need to find time taken for the potato to reach 90 degrees Celsius to the nearest tenth of a minute.
Newton's law of cooling equation is used.
Newton's Law of Cooling states that the rate of change of the temperature of an object is proportional to the difference between its own temperature and the ambient temperature.
The law of cooling is given as
[tex]T(t) = T_m + (T_0 - T_m)e^{-kt}[/tex]
whereT(t) is the temperature of the object at time t.
[tex]T_0[/tex] is the temperature of the object initially.
[tex]T_m[/tex] is the temperature of the medium in which the object is kept.
k is a positive constant.
The formula is used to solve for the time it will take the baked potato to reach 90 degrees Celsius.
This is given as:
[tex]T(t) = T_m + (T_0 - T_m)e^{-kt}[/tex]
[tex]90 = 20 + (37 - 20)e^{-kt}[/tex]
Let's start by solving for k.
[tex]37 = 20 + (37 - 20)e^{-k(10)}[/tex]
[tex]17 = 17e^{-10k}[/tex]
[tex]ln(1) = -10k[/tex]
[tex]k = 0[/tex]
Substituting k = 0 in the equation,
we have
[tex]90 = 20 + (37 - 20)e^{0(t)}[/tex]
[tex]\frac{70}{17} = e^{(0(t))}[/tex]
Taking the natural log of both sides,
[tex]ln\frac{70}{17} = lne^{0(t)}[/tex]
[tex]t= 3.0748 minutes[/tex]
Therefore, it will take approximately 3.1 minutes for the potato to reach 90 degrees Celsius to the nearest tenth of a minute.
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The average number of homes sold by the acme realty company is 2 homes per day. What is the probabilty that exactyly 3 homes will be sold tommorrow
answer choices
0.180
9.23
78
09.23
The probability that exactly 3 homes will be sold tomorrow is A) 0.1809.
To solve this problem, we can use the Poisson distribution formula, which is:
P(x; μ) = (e^-μ) (μ^x) / x!
where P(x; μ) is the probability of x events happening in a given time period, μ is the mean number of events in that time period, e is the mathematical constant approximately equal to 2.71828, and x! is the factorial of x.
In this case, we want to find the probability of exactly 3 homes being sold tomorrow, given that the average number of homes sold is 2 per day. So, we plug in μ = 2 and x = 3 into the formula:
P(3; 2) = (e^-2) (2^3) / 3! = 0.1809
Therefore, the probability that exactly 3 homes will be sold tomorrow is 0.1809 or approximately 18.09%. This means that out of every 100 days, we can expect that around 18 of those days will have exactly 3 homes sold by Acme Realty Company.
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