Answer:
Step-by-step explanation: Since the rectangle sits within the larger circle, let's look at it this way:
Area of Shaded Region = Area of Circle - Area of Rectangle
OR
(X) =( pi * r^2 ) - (rectangle length * rectangle width)
Now we fill in the numbers where we know the numbers:
(X) = (pi * (12 cm)^2) - (3cm * 10cm)
(X) = (pi * 144cm^2) - (30 cm^2)
(X) = 144pi - 30
(X) = 452.39 - 30
(X) = 422.39 cm^2
The hypotenuse of a right triangle measures 5 cm and one of its legs measures 3 cm. Find the measure of the other leg
Answer:
16
Step-by-step explanation:
a^2 + b^2 = c^2
a^2= 3^2 = 9
c^2=5^2 = 25
25-9= b^2
25-9=16
b^2 = 16
each year a company selects a number of employees for a management training program. on average, 40 percent of those sent complete the program. out of the 23 people sent, what is the probability that exactly 7 complete the program?
The probability that exactly 7 employees out of 23 sent complete the program is 0.217 or 21.7%.
In this case, the number of trials is 23, and the probability of success is 0.4 (since, on average, 40% of those sent complete the program). We want to find the probability of exactly 7 successes.
The binomial probability formula is:
P(X=k) = [tex](^n_k) \times p^k \times (1-p)^{(n-k)}[/tex]
Where P(X=k) is the probability of k successes, n is the total number of trials, p is the probability of success, and (n choose k) is the binomial coefficient, which represents the number of ways to choose k successes from n trials.
Using this formula, we can calculate the probability of exactly 7 employees completing the program as follows:
P(X=7) = [tex](^{23} _7) \times 0.4^7 \times (1-0.4)^{(23-7)}[/tex]
= 0.217 or 21.7%
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how much greater is 4/5 than 3/4?????
Answer:
To find how much greater 4/5 is than 3/4 we can turn them into decimal values:
4/5 = 0.8
3/4 = 0.75
0.8 - 0.75 = 0.05
4/5 is 0.05 or 1/20 greater than 3/4
Determine whether each expression can be used to find the length of segment AB.
AB= 10sinC
AB = 10cosA
AB = 8tanA
AB= 8tanC
A
B
27
8
10
C
The length of segment AB, is calculated using the formulae velow
AB = 10 sin CAB = 10 cos AAB = 8 tan CHow to the formulae for length of ABInformation from the question
a figure of right triangle
The length of AB is worked using SOH CAH TOA
Sin = opposite / hypotenuse - SOH
Cos = adjacent / hypotenuse - CAH
Tan = opposite / adjacent - TOA
The length of AB is solved using sin, cos and tan as follows
Sin = opposite / hypotenuse - SOH
sin C = AB / 10
AB = 10 Sin C
Cos = adjacent / hypotenuse - CAH
cos A = AB / 10
AB = 10 cos A
Tan = opposite / adjacent - TOA
tan C = AB / 8
AB = 8 tan C
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PLEASE HELP, WILL MARK BRAINLIEST
The slope-intercept definition of the linear function is given as follows:
y = -2x - 3.
How to define a linear function?The slope-intercept representation of a linear function is given by the equation presented as follows:
y = mx + b
The coefficients of the function and their meaning are described as follows:
m is the slope of the function, representing the change in the output variable y when the input variable x is increased by one.b is the y-intercept of the function, which is the initial value of the function, i.e., the numeric value of the function when the input variable x assumes a value of 0. On a graph, it is the value of y when the graph of the function crosses the y-axis.For this problem, the slope and the intercept are given as follows:
Intercept of b = -3, as when x = 0, y = -3.Slope of m = -2, as when x increases by 1, y decreases by 2.Hence the function is defined as follows:
y = -2x - 3.
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A cone has a radius of 3 inches and a slant height of 12 inches.
What is the exact surface area of a similar cone whose radius is 9 inches?
We can use the fact that the ratio of the corresponding lengths in two similar shapes is equal to the ratio of their corresponding surface areas. Since we are looking for the surface area of a similar cone with radius 9 inches, we need to find the ratio of the surface area of that cone to the surface area of the original cone with radius 3 inches.
The surface area of a cone is given by:
surface area = πr(r + l)
where r is the radius and l is the slant height.
For the original cone with radius 3 inches and slant height 12 inches, we have:
surface area of original cone = π(3)(3 + 12) = 45π
For the similar cone with radius 9 inches, we can find the slant height using the fact that the slant height and radius are proportional in similar cones. Specifically, the ratio of the slant heights is equal to the ratio of the radii. Therefore:
slant height of similar cone = (9/3)(12) = 36 inches
Using this slant height and the radius of 9 inches, we can find the surface area of the similar cone:
surface area of similar cone = π(9)(9 + 36) = 405π
Finally, we can find the ratio of the surface areas:
ratio of surface areas = surface area of similar cone / surface area of original cone
= (405π) / (45π)
= 9
Therefore, the surface area of the similar cone is 9 times the surface area of the original cone. The exact surface area of the similar cone is 9 times the surface area of the original cone, or:
9 × 45π = 405π square inches
Answer:405pi in^2
Step-by-step explanation:
. if an m-by-n matrix a multiplies an n-dimensional vector x, how many separate multiplications are involved? what if a multiplies an n-by-p matrix b?
If a multiplies an n x p matrix b then the total number of multiplications involved is m x p. And is given by Dimensional vector.
For explanation, There are two separate cases to consider when multiplying an m-by-n matrix and an n-dimensional vector, or an m-by-n matrix and an n-by-p matrix.
When an m-by-n matrix, A, multiplies an n-dimensional vector, x, the number of separate multiplications involved is m. This is because in order to compute the dot product of A and x, each row of A needs to be multiplied by the vector x, resulting in m separate multiplications.
On the other hand, when A multiplies an n-by-p matrix, B, the number of separate multiplications involved is m x p. This is because in order to multiply A and B, each row of A must be multiplied by each column of B, resulting in m x p separate multiplications.
Therefore, the number of separate multiplications involved when multiplying an m-by-n matrix and an n-dimensional vector is m, and the number of separate multiplications involved when multiplying an m x n matrix and an n x p matrix is m x p.
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You See I Have This Monster Under My Bed And Every 8 Hours He Eats 4 Cupcakes , Id Like To Buy Egnogh For The Next 24 Hours How Many Would I Need To Buy
Answer: 12 cupcakes
Step-by-step explanation:
24/8 = 3
3x4=12
Answer:
The answer to your problem is, 12
Step-by-step explanation:
First, we want to know the problem:
24 ÷ 8 = ?
? = 3
Next, we can do some easy multiplication such as the following:
3 x 4 = ?
? = 12.
Thus, the answer to your problem is, 12
a mechanic sells a brand of automobile tire that has a life expectancy that is normally distributed, with a mean life of 24,000 miles and a standard deviation of 2700 miles. he wants to give a guarantee for free replacement of tires that don't wear well. how should he word his guarantee if he is willing to replace approximately 10% of the tires?
To word his guarantee for free replacement of tires, the mechanic needs to determine the minimum life expectancy that the tires must meet in order to replace approximately 10% of them.
Since the life expectancy of the tires is normally distributed, we can use the standard normal distribution and the z-score formula to determine the minimum life expectancy that corresponds to a probability of 10%:
z = (x - μ) / σ
where z is the z-score, x is the minimum life expectancy, μ is the mean life expectancy of 24,000 miles, and σ is the standard deviation of 2700 miles.
Solving for x, we get:
x = zσ + μ
Using a standard normal distribution table or a calculator, we can find the z-score that corresponds to a probability of 10%, which is approximately -1.28. Plugging this into the formula, we get:
x = (-1.28) * 2700 + 24000
x ≈ 20,856 miles
Therefore, the mechanic should guarantee free replacement of tires that wear out before reaching a mileage of approximately 20,856 miles, in order to replace approximately 10% of the tires.
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in a sample of men, said that they had less leisure time today than they had years ago. in a sample of women, women said that they had less leisure time today than they had years ago. at , is there a difference in the proportions? use for the proportion of men with less leisure time
The test static for sample of 50 men, 44 said that they had less leisure time today than they had 10 years ago is 0.2377.
A number derived from a statistical test of a hypothesis is the test statistic. It displays how closely your actual data fit the distribution predicted by the statistical test's null hypothesis.
In order to determine whether to accept or reject your null hypothesis, the test statistic is utilised to calculate the p value of your findings.
In a sample of 50 men, 44 said that they had less leisure time today than they had 10 years ago.
In a sample of 50 women, 48 women said that they had less leisure time than they
had 10 years ago.
p-hat men:: 44/50 = 0.22
p-hat women:: 48/50 = 0.24
Test Stat:
z(0.24-0.22) =[tex]\frac{0.02}{\sqrt{[(0.22*0.78/50)+(0.24*0.76/50)]} }[/tex] = 0.2377
At [tex]\alpha[/tex] = .05, is there a difference in the proportions between the men and women
[tex]p-value = 2*P(z > 0.2377) = 0.8121[/tex]
Since the p-value is greater than 5%, fail to reject H.
H: p(men)-p(women) = 0
Ha: p(men)-p(women) # 0 = .05, is there a difference in the proportions between the men and women
p-value = 2*P(z > 0.2377) = 0.8121
Since the p-value is greater than 5%, fail to reject H.
H: p(men)-p(women) = 0
Ha: p(men)-p(women) # 0
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Complete question:
In a sample of 50 men, 44 said that they had less leisure time today than they had 10 years ago. In a sample of 50 women, 48 women said that they had less leisure time than they had 10 years ago. What is the test statistic? At [tex]\alpha[/tex] = .05, is there a difference in the proportions between the men and women?
Gerald had some green and yellow beads. The number of green beads was 1/3 the number of yellow beads. He gave each of his friends 2 green beads and 3 yellow beads. He then had 42 green beads and 270 yellow beads left.
a. How many friends did he give the beads to?
b. What was the total number of beads he had at first?
Answer:
Step-by-step explanation:
Let's use algebra to solve this problem.
Let's start by assigning variables to the unknown quantities. Let G be the initial number of green beads and Y be the initial number of yellow beads.
We know that the number of green beads is 1/3 the number of yellow beads:
G = (1/3)Y
After giving away some beads, he had 42 green beads and 270 yellow beads left. So we can set up two equations using this information:
G - 2f = 42
Y - 3f = 270
where f is the number of friends he gave the beads to.
Now we can substitute G = (1/3)Y into the first equation:
(1/3)Y - 2f = 42
Multiplying both sides by 3, we get:
Y - 6f = 126
Now we have two equations that we can solve simultaneously:
Y - 3f = 270
Y - 6f = 126
Subtracting the first equation from the second, we get:
3f = 144
So f = 48. He gave the beads to 48 friends.
To find the total number of beads he had at first, we can use the equation G = (1/3)Y:
G + Y = (4/3)Y = (4/3)(270) = 360
So he had a total of 360 beads at first.
WILL GIVE BRAINLIEST. IM IN A HURRY! A cube-shaped box has an edge length of 4/5 meter.
What is the volume of the container?
Enter your answer, as a fraction in simplest form, in the box.
which of the following is not a characteristic of the normal probability distribution? 99.72% of the time the random variable assumes a value within plus or minus 1 standard deviation of its mean.
The false statement regarding the normal distribution is given as follows:
99.72% of the time the random variable assumes a value within plus or minus 1 standard deviation of its mean.
How to obtain probabilities using the normal distribution?The z-score of a measure X of a normally distributed variable that has mean represented by [tex]\mu[/tex] and standard deviation represented by [tex]\sigma[/tex] is obtained by the equation presented as follows:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
The z-score represents how many standard deviations the measure X is above or below the mean of the distribution of the data-set, depending if the obtained z-score is positive(above the mean) or negative(below the mean).The z-score table is used to obtain the p-value of the z-score, and it represents the percentile of the measure X in the distribution.The percentage of scores within 1 standard deviation of the mean is obtained considering that:
The p-value of Z = 1 is of 0.8413.The p-value of Z = -1 is of 0.1587.Hence the percentage is given as follows:
84.13 - 15.87 = 68.26%, which is different of 99.72%.
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The correct answer is that all of the following are characteristics of the normal probability distribution as given below.
What is a probability?A subfield of statistics known as probability studies random events and their likelihood of happening.
The statement "99.72% of the time the random variable assumes a value within plus or minus 1 standard deviation of its mean" is actually a characteristic of the normal probability distribution.
The correct answer is that all of the following are characteristics of the normal probability distribution:
It is a continuous probability distribution, which means that it can take on any value within a certain range.It is symmetric around its mean.It is described by two parameters: its mean and standard deviation.The area under the curve of the probability density function is equal to 1.A large proportion (68.27%) of the data falls within one standard deviation of the mean, an even larger proportion (95.45%) falls within two standard deviations of the mean, and an even larger proportion (99.73%) falls within three standard deviations of the mean.To know more about probability, visit:
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Roy bought a board game for $22. Then, he marked up the price of the board game and resold it for $25.78. What percentage of the original price was the markup rate?
15. Anna has $2.00 in change, including 5 quarters. What is the maximum number of dimes she can have? A 2 C 7 B 5 D 9
Answer:
To solve the problem, we need to first determine the value of the quarters Anna has. Since there are 5 quarters, we have:
5 quarters = 5 x $0.25 = $1.25
Thus, Anna has $2.00 - $1.25 = $0.75 left. We can find the maximum number of dimes she can have by dividing this amount by the value of a dime, which is $0.10. Therefore:
$0.75 ÷ $0.10 = 7.5
Since Anna cannot have a fraction of a dime, we round down to the nearest whole number to get a maximum of 7 dimes. Therefore, the answer is option B, 5.
if she picks another 250 balls at random, how many red balls should she expect
Answer:
Step-by-step explanation:
250
I NEED HELP ON THIS ASAP!!
A sports ticketing company offers two ticket plans. One plan costs $110 plus $25 per ticket. The other plan costs $40 per ticket. How many tickets must Gloria buy in order for the first plan to be the better buy?
Answer: Gloria must but at least one ticket in order for the first plan to be the better plan
What are linear and non-linear functions?
A straight line on the coordinate plane is represented by a linear function. As an illustration, the equation y = 3x – 2 depicts a linear function because it is a straight line in the coordinate plane.
Any function whose graph is not a straight line is said to be nonlinear. Any curve other than a straight line can be a graph of it.
An example of a non-linear function is a quadratic function.
Given, A sports ticketing company offers two ticket plans. One costs $11 plus $25 per ticket and the other plan costs$40 per ticket.
Let, The number of tickets be 'x'.
Therefore, The number of tickets Gloria should buy so that the first plan is a better plan is,
11x + 25 < 40x.
11x - 40x < - 25.
- 29x < - 25.
29x > 25.
x > 25/29.
x > 0.86.
So, Gloria must buy at least 1 ticket.
Step-by-step explanation:
En la situación de la alberca olímpica cuyo volumen es de 3750m³.¿Que capacidad de agua tiene?
Answer:
Step-by-step explanation:
Y
I’m a little confused on this, also this is about complementary and supplementary angles.
Answer:
1. 48
2. 103
3. 47
4. 60
hope this helps
Help help help help help HELP ME PLEASE THIS IS DUE REALLY SOOONNN
answer for number 14 is 1115
you mutliply 27 into 1 ×45 into 100
it is 100 because we are dealing with percentage
so you say (write in fraction form)
27÷1×45÷100
=1215÷100
you get the answer of 1115
so there were 1115 female butterflies
we can subtract the answer from the original number to get the number of male butterflies
1215-1115 =100 male butterflies
find sin A 97, 72,65
Therefore, sin(A) is approximately 0.6708 (rounded to four decimal places).
What is trigonometry?Trigonometry is a branch of mathematics that deals with the relationships between the sides and angles of triangles. It is used to solve problems related to geometry, physics, engineering, and many other fields. Trigonometry is based on the study of the six trigonometric functions: sine (sin), cosine (cos), tangent (tan), cosecant (csc), secant (sec), and cotangent (cot). These functions describe the ratios of the lengths of the sides of a right triangle, and can be used to calculate the unknown side lengths or angles of a triangle. Trigonometry is also useful for working with periodic functions, such as waves and oscillations. The trigonometric functions can be used to model and analyze these periodic phenomena, and to predict future behavior based on past observations. Applications of trigonometry can be found in many areas of science, engineering, and technology, including astronomy, navigation, architecture, surveying, and electronics.
Here,
To find sin(A), we need to use the trigonometric ratios of the sides of the right triangle ABC, where angle A is opposite to side a, angle B is opposite to side b and angle C is opposite to side c. We have sides of the triangle as follows:
a = 72
b = 65
c = 97
To find sin(A), we can use the following formula:
sin(A) = opposite/hypotenuse
In this case, the opposite side of angle A is b and the hypotenuse is c, so we have:
sin(A) = b/c
sin(A) = 65/97
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Complete question:
Find sin(A) when we have sides of the triangle as follows:
a = 72
b = 65
c = 97
does anyone know the answer??
The point that partitions segment AB in a 1:4 ratio is (-1, -0.4).
How to determine the coordinates of point Q?In this scenario, line ratio would be used to determine the coordinates of the point Q on the directed line segment AB that partitions the segment into a ratio of 1 to 4.
In Mathematics, line ratio can be used to determine the coordinates of Q and this is modeled by the following mathematical expression:
Q(x, y) = [(mx₂ + nx₁)/(m + n)], [(my₂ + ny₁)/(m + n)]
Substituting the given parameters into the line ratio formula, we have;
Q(x, y) = [(1(7) + 4(-3))/(1 + 4)], [(1(-10) + 4(2))/(1 + 4)]
Q(x, y) = [(7 - 12)/(5)], [(-10 + 8)/5]
Q(x, y) = [-5/5], [(-2)/(5)]
Q(x, y) = [-1, -2/5]
Q(x, y) = [-1, -0.4]
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Please I really need the help I only have 30 minutes left this is my second attempt at this
The correct option is the second one, your supervisor did not divide by the total number of bags.
What mistake did your supervisor did?Here we can see a table with the size of each bag (in grams) and the number of sold bags.
Now, remember that for a set of N numbers {x₁, ..., xₙ} the mean is:
M = (x₁ + x₂ + ...)/N
So the denominator is the amount of elements in the set.
Then here in the denominator we should see the total number of bags sold, which is:
25 + 32 + 40 + 18 = 115
That number should be in the denominator instead of the sum of the masses.
Then the correct option is the second one.
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What is the area of the parallelogram? 50 points each if u answer 100 points in total answer please
Responses
18 square units
21 square units
16 square units
28 square units
Answer:
A = 21 units²
Step-by-step explanation:
the area (A) of a parallelogram is calculated as
A = bh ( b is the base and h the perpendicular height between parallel sides )
here b = 7 and h = 3 , then
A = 7 × 3 = 21 units²
the diameter of a gazebo is 15 ft. what is its circumference? round the answer to one decimal place:
The circumference of a gazebo is 47.1 ft
To calculate the circumference, you can use the formula C=2πr. This formula states that the circumference of a circle is equal to two times the constant π (approximated as 6.28) multiplied by the radius of the circle. The radius of a circle is equal to half of the diameter, so in this case the radius would be 7.5 ft (half of 15 ft).
Therefore, to calculate the circumference of a gazebo with a diameter of 15 ft, you can use the formula C=2πr. Plugging in the radius of 7.5 ft, the equation would become C=2π(7.5) which results in a circumference of 47.12 ft. To round this answer to one decimal place, the final answer is 47.1 ft
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suppose a class has 50 students, and 10 of them are math majors. in how many ways can the students be lined up so that all the math majors are in the front half of the line?
If the class has 50 students, and 10 of them are math majors There are a total of 50! (50 factorial) ways to line up the 50 students.
To ensure that all the 10 math majors are in the front half of the line, the first 10 positions in the line must be filled by the math majors, leaving 40 positions in the second half to be filled by the remaining 40 students.
Thus, there are 10! (10 factorial) ways to fill the first 10 positions and 40! (40 factorial) ways to fill the second half.
Therefore, the total number of ways to line up the students so that all the math majors are in the front half of the line is
10! × 40! = 30,240,000.
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I NEED HELP PLEASE!!!
I have no idea, good luck though pal
Step-by-step explanation:
You
Got
This
<3
A little help :) Appreciated - 40 points
Which statements about this system of equations are true? Check all that apply
2 x minus 7 y = negative 13. Negative 2 x + 11 y = 1.
The x-variable will be eliminated when adding the system of equations.
The y-variable will be eliminated when adding the system of equations.
The sum of the system of equations is 4 y = negative 12.
x = 17
y = negative 3
There are infinitely many solutions to the system of equations.
As a result, (x, y) = is the answer to a set of equations. (-17, -3). There aren't an endless number of answers because there is a single one.
What sort of equation would that be?The meaning of an equation in algebra is a mathematical assertion that demonstrates the equality of two mathematical expressions. For instance, the equation 3x + 5 = 14 consists of the two expressions 3x + 5 and 14, which are split by the 'equal' symbol.
The statements that are true about this system of equations are:
The x-variable will be eliminated when adding the system of equations.
There are infinitely many solutions to the system of equations.
To eliminate the x-variable, we can add the two equations as follows:
(2x - 7y) + (-2x + 11y) = -13 + 1
Simplifying the left-hand side and the right-hand side gives:
4y = -12
Dividing both sides by 4 yields:
y = -3
Substituting y = -3 into either of the original equations gives:
2x - 7(-3) = -13
Simplifying this equation yields:
2x + 21 = -13
Subtracting 21 from both sides yields:
2x = -34
Dividing both sides by 2 yields:
x = -17
Therefore, the solution to the system of equations is (x, y) = (-17, -3). Since there is a unique solution, there are not infinitely many solutions.
The statement "The sum of the system of equations is 4y = -12" is false since the sum of the equations does not simplify to that expression.
The statement "x = 17" is false since the correct solution is x = -17.
The statement "The y-variable will be eliminated when adding the system of equations" is false since adding the equations only eliminated the x-variable.
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Please HELP I have a math test tommorow and I ned to study!!
This is one of the questions..
If y is directly proportional with x and y = 36 when x = 30, what is the value of y when x = 25?
THANK YOU!! <3
The value of y when x = 25 is 30
What are direct variations ?
One quantity directly changes in response to a change in another quantity, which is referred to as direct variation. This suggests that if one quantity increases, the other will follow suit and rise in proportion. In a similar manner, if one quantity declines, the other amount also declines.
given y is directly proportional to x then the equation connecting them is
y = kx ← k is the constant of proportionality
To find k use the condition y = 36 when x = 30
So, 36=k(30)
=> k = 36/30 = 1.2
equation of proportionality:
y=1.2x
When x = 25 then
y=1.2(25) = 30
The value of y when x = 25 is 30
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