Answer:
Step-by-step explanation:
minute= 250 per minute
mph = 1500/5280
Need help quick please
Answer:-1/6
Step-by-step explanation:
Draw a line out in the 2nd quadrant.
Your y=[tex]\sqrt{35}[/tex] hypotenuse=6 use pythagorean theorem to solve for x
6² = 35 + x²
x=1
so
cosΘ = -1/6
local restaurant, Enrique is paid $4.15 per hour and earns an average of 21% tips on all food sales. Identify the algebraic expression that could be used to represent Enrique's gross pay.
The complete algebraic expression would be
Gross wages = 4.15 × hours worked + 0.21 × total food sales.
What is an algebraic expression?
The idea of expressing numbers using letters or alphabets without specifying their actual values is called Algebraic expressions . The basics of algebra taught us to express an unknown value with letters like x, y, z, etc. These letters are called variables here. It can be a combination of both constants and variables. Any value placed in front of a variable and multiplied by it is a coefficient.
Examples,
3x + 4a – 7, 4x – 10, etc.
These expressions are represented using unknown variables, constants, and coefficients. A combination of these three (as terms) is considered an expression. It should be remember that unlike an algebraic equation, an algebraic expression has no sides or an equal sign. Some examples of this include,
3x + 2y - 5x-202x²– 3xy + 5An algebraic expression that could be used to represent Enrique's gross salary would be:
Gross salary = hourly rate x hours worked + tip
Where Hourly rate = $4.15 per hour
Hours Worked = Number of hours worked by Enrique
Tipping = 21% of total food sales
So the complete algebraic expression would be:
Gross wages = 4.15 × hours worked + 0.21 × total food sales.
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If you have ln {A}=.552, how do you take e^x for both sides of the equation? Thanks.
The solution to the equation ln {A} = .552 is A = e[tex]^{0.552}[/tex] = 2.7. In order to calculate eˣ for both sides of the equation ln {A}=.552, one must first understand what the equation signifies.
What is logarithmic equation?A logarithmic equation is an equation involving logarithms of different variables. Logarithmic equations are used to solve various types of problems. It uses the logarithmic properties of multiplication and division to simplify the equation.
This equation is a logarithmic equation, in which ln (natural logarithm) is used to represent a number's exponential value.
This means that the equation is actually stating that A is equal to e raised to the power of 0.552 (e[tex]^{0.552}[/tex] ).
In order to solve for A, one must use the basic rule of logarithms: for any logarithmic equation of the form ln {A} = B, A = e^B.
Therefore, the solution to the equation ln {A} = .552 is
A = e[tex]^{0.552}[/tex] .
This equation can be solved using basic algebra, as e[tex]^{0.552}[/tex] can be replaced with an equivalent expression.
The equation can be rewritten as A = (e[tex]^{0.5}[/tex])(e[tex]^{0.052}[/tex]).
The value of e[tex]^{0.5}[/tex] can be calculated using a calculator, and can be rounded to the nearest tenth.
The value of e[tex]^{0.052}[/tex] can then be calculated, which can also be rounded to the nearest tenth.
Adding the two values together will give the solution to the equation, which is A = 2.7.
Therefore, the solution to the equation ln {A} = .552 is
A = e[tex]^{0.552}[/tex]
= 2.7.
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Gas prices are going to increase by 5% in the coming months. A gallon of gas costs $2.35 at the moment. What will the price be after the increase
Answer:
$2.4675
Step-by-step explanation:
you could have just used a calculator for this one tbh
You sell 600 shares of AVG Technologies (AVG). You purchased the stock at $2.99 per share and sold it at $0.88 per share. What was the percent decrease in the stock? Round to the nearest whole percent.
71%
29%
42%
24%
Answer:
71%
Step-by-step explanation:
To calculate the percent decrease in the stock, we can use the following formula:
Percent decrease = ((Original value - New value) / Original value) * 100
Given:
Original value (purchase price) = $2.99 per share
New value (selling price) = $0.88 per share
Plugging in the values into the formula:
Percent decrease = ((2.99 - 0.88) / 2.99) * 100
Percent decrease = (2.11 / 2.99) * 100
Percent decrease = 70.57%
Rounding to the nearest whole percent, the correct answer is 71%.
Peter's school is selling tickets to the annual talent show. On the first day of ticket sales, the school sold 10 adult tickets and 7 student tickets for a total of $128. The school took in $217 on the second day by selling 7 adult tickets and 14 student tickets. Find the price of an adult ticket and the price of a student ticket.
Answer the following questions in order making sure you number your answers:
1. What are my 2 equations for this real-world word problem?
2.) What is the solution? Remember I need your solution (answer) in an ordered pair (x,y)
3.) Explain what the price is for an adult ticket and the price for a student ticket
The price for an adult ticket is $3 and the price for a student ticket is $14
Finding the cost of the tickets for students and adultsGiven that
first day of ticket sales, the school sold 10 adult tickets and 7 student tickets for a total of $128. $217 on the second day by selling 7 adult tickets and 14 student ticketsSo, we have
10x + 7y = 128
7x + 14y = 217
Where
x = adults and y = students
When solved graphically, we have
x = 3 and y = 14
Hence, the price of the student ticket is $14
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Question 1 of 10
A computer randomly puts a point inside the rectangle. What is the probability that the point lands in square S?
T2
A. 1/3
B. 5/6
C. 3/8
D. 1/6
The probability that the point land in square S will be 5/6.
What is probability?
Probability is a branch of mathematics in which the chances of experiments occurring are calculated. It is by means of a probability, for example, that we can know from the chance of getting heads or tails in the launch of a coin to the chance of error in research.
The probability that the point does not land in triangle T is equal to subtract the area of triangle T from the area of rectangle and divided the result by the the area of rectangle
so, Find out the area of rectangle
A = (6)(4)
= 24 unit²
Find out the area of triangle T
A = 1/2(2)(4)
= 4 unit²
The probability is equal to
P = (24-4) / 24
= 20/24
= 5/6
Hence, the probability that the point land in square S will be 5/6.
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Suppose Juan places $6500 in an account that pays 8% interest compounded each year. Assume that no withdrawals are made from the account.
The amount in the account after 5 years would be $9555.42.
What is the formula for compound interest?
[tex]A = P(1 + \frac{r}{n} )^{(nt)}[/tex]
Where:
A = the amount of money in the account after t years
P = the principal amount (initial investment)
r = the annual interest rate (as a decimal)
n = the number of times the interest is compounded per year
t = the number of years
In this case, P = $6500, r = 8% = 0.08, n = 1 (compounded annually), and t is the number of years.
If no withdrawals are made from the account, then the amount of money in the account after t years will be
[tex]A = 6500(1 + \frac{0.08}{1})^{(1t)} \\ A = 6500(1.08)^t[/tex]
Now the amount of money in the account after a specific number of years,
A = 6500(1.08)⁵
A = 6500(1.469328)
A = $9555.42
So after 5 years, the amount in the account would be $9555.42
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Correct question is "Suppose Juan places $6500 in an account that pays 8% interest compounded each year. Assume that no withdrawals are made from the account.Then find What would be the amount in the account after 5 years?"
please help me answer this
Sequence 1: 13, 16, 19, 22, 25, Sequence 2: 15, 13, 11, 9, 7 and Ordered Pair: (13, 15), (16, 13), (19, 11), (22, 9), (25, 7).
what is sequence?
An ordered list of numbers is a sequence. The three dots indicate that the established pattern should move forward.
A. Sequence 1: 13, 16, 19, 22, 25
Sequence 2: 15, 13, 11, 9, 7
Ordered Pair: (13, 15), (16, 13), (19, 11), (22, 9), (25, 7)
B. Sequence 1: 1, 5, 17, 53, 161
Sequence 2: 6, 15, 33, 69, 141
Ordered Pair: (1, 6), (5, 15), (17, 33), (53, 69), (161, 141)
C. Input (x) | Output
1 | 17, 2 | 19, 3 | 21, 4 | 23
D. Input (x) | Output
1 | 30, 2 | 15, 3 | 7.5
To find the outputs, we use the formula: output = 60 ÷ 2x.
For x = 1, output = 60 ÷ 2(1) = 30
For x = 2, output = 60 ÷ 2(2) = 15
For x = 3, output = 60 ÷ 2(3) = 7.5
E. Input (x) | Output
1 | 23, 2 | 30, 3 | 37, 14 | 102, 15 | 109, 16 | 116, 27 | 205, 70 | 498
To find the outputs, we use the formula: output = 16 + 7x.
For x = 1, output = 16 + 7(1) = 23
For x = 2, output = 16 + 7(2) = 30
For x = 3, output = 16 + 7(3) = 37
For x = 14, output = 16 + 7(14) = 102
For x = 15, output = 16 + 7(15) = 109
For x = 16, output = 16 + 7(16) = 116
For x = 27, output = 16 + 7(27) = 205
For x = 70, output = 16 + 7(70) = 498
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I need help now please!
Answer:
Step-by-step explanation:
Draw a line out in the 3rd quadrant. Hyponuse would be 3; y=-2 find x using pythagorean theorem
so 3²=2²+x²
x=[tex]\sqrt{5}[/tex]
so cos Θ = [tex]\frac{\sqrt{5} }{3}[/tex]
The functions f(x) = 500(1.015)* and g (x) =
500(1.021)* give the total amounts in two different savings accounts after x years. How do the graphs of f(x) and g(x) compare?
A. They have the same y-intercept, but the graph of f(x) rises more quickly over time.
B. They have the same y-intercept, but the graph of g(x) rises more quickly over time.
C. The function f(x) has a greater -intercept and rises more quickly over time.
D. The function g(x) has a greater -intercept and rises more quickly over time.
The correct answer is: B. They have the same y-intercept, but the graph of g(x) gets faster over time.
What is exponent and power?Exponents and powers are ways of representing very large or very small numbers in a simplified way. For example, if we need to represent 3 x 3 x 3 x 3 in a simple way, we can write it as 34, where 4 is the exponent and 3 is the base. The whole expression 34 is said to be a force.
The functions provided are:
[tex]f(x) = 500(1.015)^x[/tex]
[tex]g(x) = 500(1.021)^x[/tex]
Both functions have an initial value of $500 (when x = 0). Therefore, they share the same y-intercept, which is (0, 500).
To compare the graphs of f(x) and g(x), we can look at their growth rates. Note that the exponent of f(x) has a base of 1.015, while the exponent of g(x) has a base of 1.021. Since both bases are greater than 1, both functions grow exponentially with time.
However, since 1.021 is greater than 1.015, the function g(x) increases with time faster than f(x). This means that the graph of g(x) is steeper than the graph of f(x).
Therefore, the correct answer is:
B. They have the same y-intercept, but the graph of g(x) gets faster over time.
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Higher Order Thinking Morgan read
a thermometer at 7:00 P.M. The
temperature was 16°C. This temperature
was 9°C less than the temperature at
2:00 P.M. The temperature at 2:00 P.M.
was 10°C higher than the temperature at
8:00 A.M. What was the temperature at
8:00 A.M.?
The temperature at 8:00 A.M. was 15°C.
Using the given information:
1. At 7:00 P.M., the temperature was 16°C.
2. This temperature was 9°C less than the temperature at 2:00 P.M.
We can use this information to find the temperature at 2:00 P.M.:
Temperature at 2:00 P.M. = 16°C (temperature at 7:00 P.M.) + 9°C
Temperature at 2:00 P.M. = 25°C
3. The temperature at 2:00 P.M. was 10°C higher than the temperature at 8:00 A.M.
Now, we can find the temperature at 8:00 A.M.:
Temperature at 8:00 A.M. = 25°C (temperature at 2:00 P.M.) - 10°C
Temperature at 8:00 A.M. = 15°C
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What is the solution to 10 − 3(m − 5) = 2(5 − m)?
Answer:
15 = m
Step-by-step explanation:
10 − 3(m − 5) = 2(5 − m)
10 - 3m + 15 = 10 - 2m
25 - 3m = 10 - 2m
25 - 10 = - 2m + 3m
15 = m
__________
hope it helps!
Answer:
m=15
Step-by-step explanation:
10 − 3(m − 5) = 2(5 − m)
-3m+25=10-2m
-3m= -2m -15
-m=-15
m=15
find the sum
-27 - 3
complete the square to solve the equation below x2+x=11/4
The solutions to the equation [tex]x^{2} + x[/tex] = 11/4 are x = -1/2 + [tex]\sqrt{3}[/tex] and x = -1/2 - [tex]\sqrt{3}[/tex]
What is the equation?
An equation is a mathematical statement that indicates that two expressions are equivalent. It has two sides, one on each side, divided by an equals sign (=). An equation's left and right sides can contain numbers, variables, and mathematical operations, including addition, subtraction, multiplication, and division.
The left side of the equation should be rewritten in the form (x + a)2, where an is a constant, in order to complete the square and find the solution to the equation [tex]x^{2}+x[/tex] = 11/4.
To accomplish this, add and remove [tex](1/2)^{2}[/tex](which is equivalent to 1/4) inside of the brackets, as seen in the example below:
[tex]x^{2} +x[/tex]= 11/4
[tex]x^{2} +x[/tex]+ 1/4 - 1/4 = 11/4
[tex](x+1/2)^{2}[/tex] - 1/4 = 11/4
[tex](x+1/2)^{2}[/tex] = 3
Next, we take the square root of both sides:
x + 1/2 = ±[tex]\sqrt{3}[/tex]
Finally, we solve for x by subtracting 1/2 from both sides:
x = -1/2 ± [tex]\sqrt{3}[/tex]
So the solutions to the equation [tex]x^{2} +x[/tex] = 11/4 are x = -1/2 + [tex]\sqrt{3}[/tex] and x = -1/2 - [tex]\sqrt{3}[/tex].
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Tyler invests $9700 in two different accounts. The first account paid 10%, the second account paid 9% in interest. At the end of the first year he had earned $931 in interest. How much was in each account?
Answer:
First account: $6380.
Second account: $4251.
Step-by-step explanation:
let the first account have $x at the start of the first year
So at the end of 1 year it had x + 0.1x = $1.1x
In the same we we calculate the amount in the second account
= $1.09(9700 - x)
So we have the following equation
1.1x + 1.09(9700 - x) = 9700 + 931
1.1x + 10573 - 1.09x = 10631
0.01x = 10631 - 10573 = 58
x = 58/0.01
=$5800
So at the end of the year there was
5800 * 1.1 = $6380 in first account
and
the second account had
1.09 (9700 - 5800) = $4251.
looking at each individual factor of the polynomial, what power causes the graph to BOUNCE at the zero related to that factor?
The graph will bounce like a polynomial of degree equal to the multiplicity minus 1.
What is polynomial?
A polynomial is a mathematical expression that consists of variables and coefficients, which are combined using arithmetic operations such as addition, subtraction, multiplication, and non-negative integer exponents.
The power of the factor that causes the graph to bounce at the corresponding zero depends on the multiplicity of the zero.
If the zero has odd multiplicity, the graph will cross the x-axis at the zero, meaning there will be no bounce.
If the zero has even multiplicity, the graph will bounce at the zero. Specifically, if the multiplicity is 2, the graph will bounce like a parabola; if the multiplicity is 4, the graph will bounce like a quartic; and so on. In general, the graph will bounce like a polynomial of degree equal to the multiplicity minus 1.
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An incubation time for a breed of chicks is normall distributed with a mean of 29 days and a standard deviation of approximately 2 days.If 1000 eggs are being incubated, how many chicks do we expect will hatch in the following time periods?
a) in 25 to 33 days
b) in 27 to 31 days
c) in 29 days or fewer
d) in 23 to 35 days
For the given normal distribution a. We expect approximately 954 chicks to hatch between 25 and 33 days. b. We expect approximately 683 chicks to hatch between 27 and 31 days.
What is normal distribution?A probability distribution that is frequently used in statistics is the normal distribution, usually referred to as the Gaussian distribution. The majority of the data are within one standard deviation of the mean, resulting in a bell-shaped curve that is symmetrical around the mean.
In a normal distribution, the mean, median, and mode are all equal, and the mean and standard deviation serve as the two parameters that define the curve. While the standard deviation reflects the distribution's spread, the mean represents the distribution's centre.
The z-score is given by the formula:
z = (x - mu) / sigma
a. For 25 to 33 days:
z = (25 - 29) / 2
z = -2
and
z = (33 - 29) / 2
z = 2
Thus, P(z < 2) = 0.9772.
Now, we have:
P(25 < x < 33) = P(z < 2) - P(z < -2)
P(25 < x < 33) = 0.9772 - 0.0228
P(25 < x < 33) = 0.9544
Expected number of chicks = 0.9544 x 1000 = 954.4
Hence, we expect approximately 954 chicks to hatch between 25 and 33 days.
b. For 27 to 31 days:
P(27 < x < 31) = P(z < 1) - P(z < -1)
P(27 < x < 31) = 0.8413 - 0.1587
P(27 < x < 31) = 0.6826
Expected number of chicks = 0.6826 x 1000 = 682.6
Therefore, we expect approximately 683 chicks to hatch between 27 and 31 days.
c. For 29 days or fewer:
P(x <= 29) = P(z <= 0) = 0.5
Expected number of chicks = 0.5 x 1000 = 500
d. In 23 to 35 days:
P(23 < x < 35) = P(z < 3) - P(z < -3)
P(23 < x < 35) = 0.9987 - 0.0013
P(23 < x < 35) = 0.9974
Expected number of chicks = 0.9974 x 1000 = 997.4
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Solve for x for this problem
Answer:
x = 7
Step-by-step explanation:
the sum of the 3 angles in a triangle = 180°
sum the 3 angles and equate to 180
9x - 3 + 30 + 90 = 180
9x + 117 = 180 ( subtract 117 from both sides )
9x = 63 ( divide both sides by 9 )
x = 7
6. The piece of pizz M
Kinser got forms the
angle KLM that mesure 138, She split the
pizza into 3 pieces that were not equal
in size. What are possible measurements
of the angles of the pieces of pizza if she splits the
pizza into 3 pieces? Please explain your answer.
larl
42
3113
n
18
O
4
L
138⁹
I need help!
I need to show my work to,
What is the volume of the prism?
Answer:
1499.06 cm³
Step-by-step explanation:
volume = length × width × height
length = 22.5 cm
width = 10.25 cm
height = 6.5 cm
volume = 22.5 cm × 10.25 cm × 6.5 cm
volume = 1499.0625 cm³
Answer: 1499.06 cm³
Which term best describes the shape of this distribution?
Responses
bimodal
bimodal
skewed
skewed
normal
normal
Histogram with 8 vertical bars. The middle bars are highest and the heights decrease evenly from the middle to the left and from the middle to the right.
Answer:
normal distribution curve
Step-by-step explanation:
It is given that the bars decrease evenly from the middle to the left and from the middle to the right.
Grant scored a 70% on his math quiz. If there were 40 problems, how many did he answer correctly?
Answer: 12
........................................
3. The Smith family ate 3/8 of a quart of strawberries after dinner. The next day, Marie and her
two friends ate an equal share of the remainder of the strawberries. What fraction of the
whole quart of strawberries did each of the three girls eat?
A. 5/24
B 3/8
C 5/8
D 3/24 or 1/6
Espresso Yourself Coffee Shop hires workers in a competitive labor market to make coffee. The ingredients required to make each cup of coffee cost 50 cents. The
coffee shop's hourly output of coffee varies with the number of workers hired, as shown in the accompanying table. Each cup of coffee sells for $2.
Number of workers Coffee (cups/hour)
0
25
45
60
70
0
1
2
3
4
5
75
78
The value of marginal product of the first worker is
O $37.50
O $25.00
O $2.00
O $1.50
per hour,
Based on the calculations given below, the value of the marginal product is option A: $37.50.
What is the value of the marginal product?The value of marginal product (VMP) is one that can be calculated as the additional revenue generated by hiring an additional worker.
So to o calculate the VMP of the first worker, it will be:
Hence:
VMP of the first worker = (output with one worker - output with zero workers) x price per unit
VMP of the first worker = (25 - 0) x $2
= $50
Note that the ingredients needed to make each cup of coffee cost 50 cents, so the total cost of making 25 cups of coffee with one worker will be:
Total cost = ingredients cost x output
= $0.50 x 25
= $12.50
So, the value of the marginal product of the first worker can be obtained by:
VMP of the first worker = additional revenue - additional cost
= $50 - $12.50
= $37.50
So the value of the marginal product is: $37.50.
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Median of 3,6,9,7,4,6,7,0,7
The median, mean, range and mode will be 6, 5.4, 9 and 7.
What is median?
The median is the middle number in the data set when the data set is written from least to greatest.
The median is the number in the middle when arranged in an ascending order. The numbers will be:
0, 3, 4, 6, 6, 7, 7, 7, 9.
The median is 6.
The range is the difference between the highest and lowest number which is: = 9 - 0 = 9
The mode is the number that appears most which is 7.
The mean will be the average which will be:
= (0 + 3 + 4 + 6 + 6 + 7 + 7 + 7 + 9) / 9.
= 49/9
= 5.4
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You are deciding between two different health care plans offered by your employer, Please make your choios based off of your individual health and financial situation. While justifying the plan you have choosen be sure to demonstrats your knowledge on the vocabulary terms like premiums, co-payments, deductibles, HMO, PPO, and coverage.
HMO Plan:
Coverage: 100%/0%
Deductible: $500
Premium: $450/month (70% paid by employer)
Co-pay: $25
PPO Plan:
Coverage: 80%/20%
Deductible: $1,000
Premium: $250/month (75% paid by employs)
Co-pay: $25
We can see that for one who doesn't fall ill frequently, the PPO Plan will be the best. This is as a result of its lower premium and broader network of healthcare providers.
What is PPO Plan?A PPO (Preferred Provider Organization) plan is known to be a type of health insurance plan which allows individuals to actually choose their healthcare providers. It allows them to choose from a network of preferred providers who have agreed to provide services at a discounted rate.
We can see here that in the PPO Plan, the PPO (Preferred Provider Organization) plan actually has a lower premium, but the coverage is only 80%, and you need to pay 20% of the cost-sharing or co-insurance.
Also, the PPO plan has a higher deductible of $1,000, which means that the insurance coverage starts later.
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Question 5 (5 points)
The figure above shows the solution to a compound inequality. Which inequality
does the solution show?
OA) -2
B) -2
OC) -2 ≤ x-5 < 6
OD) -2 ≤ x + 5 < 6
The inequality with the given solution set is given as follows:
D. -2 ≤ x + 5 < 6.
What are the inequality symbols?The four inequality symbols, along with their meaning on the number line and the coordinate plane, are presented as follows:
> x: the amount is greater than x -> the number is to the right of x with an open dot at the number line. -> points above the dashed horizontal line y = x on the coordinate plane.< x: the amount is less than x. -> the number is to the left of x with an open dot at the number line. -> points below the dashed horizontal line y = x on the coordinate plane.≥ x: the amount is at least x. -> the number is to the right of x with a closed dot at the number line. -> points above the solid vertical line y = x on the coordinate plane.≤ the amount is at most x. -> the number is to the left of x with a closed dot at the number line. -> points above the dashed vertical line y = x on the coordinate plane.The solution to the compound inequality in this problem is given as follows:
-7 ≤ x < 1.
Hence the inequality can be obtained adding 5 to each term, as follows:
-7 + 5 ≤ x + 5 < 1 + 5 = -2 ≤ x + 5 < 6.
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Please Help!!
-115=20+3(4d-2)
Answer:
the solution is d = -10.75.
Step-by-step explanation:
To solve for d in this equation, we need to first simplify it by distributing the 3 on the right side:
-115 = 20 + 12d - 6
Next, we combine like terms on the right side:
-115 = 14 + 12d
Then, we isolate the variable term by subtracting 14 from both sides:
-129 = 12d
Finally, we solve for d by dividing both sides by 12:
d = -10.75
Therefore, the solution is d = -10.75.
Answer:
[tex]d=-\frac{43}{4}[/tex]
Step-by-step explanation:
First, let's apply the distributive property and multiply 4d and -2 by 3.
We have:
[tex]-115=20+3(4d-2)=\\-115=20+3(4d)+3(-2)=\\-115=20+12d-6[/tex]
Now, let's combine like terms.
[tex]-115=20+12d-6=\\-135=12d-6=\\-129=12d=\\-\frac{129}{12} =d[/tex]
Both 129 and 12 are divisible by 3, so let's simplify the fraction:
[tex]d=-\frac{129}{12} =\\d=-\frac{43}{4}[/tex]
An aircraft emergency locator transmitter (ELT) is a device designed to transmit a signal in the case of a crash. Company A makes 50% of the ELTs, Company B makes 45% of them, and the Company C makes the other 5% The ELTs made by Company A have a 4% rate of defects, the Company B's ELTs have a 6% rate of defects, and the Company C's ELTs have a 9% rate of defects. If a randomly selected ELT is then tested and is found to be defective, what is the probability that it was made by the Company B?
Answer:
We are given that 50% of the ELTs are made by Company A, 45% are made by Company B, and 5% are made by Company C. We also know the rate of defects for each company's ELTs: 4% for Company A, 6% for Company B, and 9% for Company C.
Let D be the event that an ELT is defective, and let Bi be the event that an ELT was made by Company i, where i = A, B, or C. We want to find the probability that an ELT is made by Company B given that it is defective, i.e., we want to find P(B|D).
Using Bayes' theorem, we can write:
P(B|D) = P(D|B) * P(B) / P(D)
where P(D|B) is the probability that an ELT made by Company B is defective, P(B) is the prior probability that an ELT is made by Company B, and P(D) is the overall probability of an ELT being defective.
We can calculate each of these probabilities as follows:
P(D|B) = 0.06 (given)
P(B) = 0.45 (given)
P(D) = P(D|A) * P(A) + P(D|B) * P(B) + P(D|C) * P(C)
= 0.04 * 0.5 + 0.06 * 0.45 + 0.09 * 0.05
= 0.0355
Substituting these values into Bayes' theorem, we get:
P(B|D) = P(D|B) * P(B) / P(D)
= 0.06 * 0.45 / 0.0355
≈ 0.762
Therefore, the probability that an ELT made by Company B is defective given that it is found to be defective is approximately 0.762, or 76.2%.