X=-1
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ANSWER
When is written in the form , it looks like
EXPLANATION
To write in the form , we have to complete the squares.
We add and subtract half the coefficient of square.
The first three terms of the function is now a perfect square.
We now simplify rto obtain,
Answer:
0.917915
Step-by-step explanation:
Exponential distribution is expressed as it follows
F (y,λ) = 1 – e ^(- λ(y)
)
Where λ is equal to 1/ population mean
So λ = 1/2.8 = 0.357
Let y be the length of time a costumer wait on hold
Now, let´s find the value for y = 7 minutes, which is the proportion of costumer that wait on hold
P (y<7) = 1 – e^(- .357*(7)
)
P (y<7) = 0.917915
Answer:
The probability that X is nine or more is 0.405.
Step-by-step explanation:
We have a sample of 20 random selected workers, each with a probability p=0.4 of changing jobs for "slightly higher pay".
We have a random variable X that can be modeled by the binomial distribution, with parameters n=20 (sample size) and p=0.4 (probability of success).
The probability that k workers will change jobs for slightly higher pay can be calcualted as:
We have to calculate the probability that the number of workers in the sample who will change jobs for slightly higher pay is 9 or higher. That is P(X≥9).
The length of rectangle is: 17
Further explanation:
Given
Perimeter = 48
Let L be the length
Let W be the width
Then
Putting the value of L in perimeter
Putting W=7 in second equation
Hence,
The length of rectangle is: 17
Keywords: Perimeter of rectangle, Linear equations
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