The amount of time it takes Robby to go grocery shopping is continuous and uniformly distributed between 20 minutes and 45 minut
1 answer:
Answer:
0.4
Explanation:
This problem has been solved using the method of integration.
We are required to solve for the probability that it takes Robby between 29 and 39 minutes to go grocery shopping
= X~U(20,45)
= 1/45-20
= 1/25
Then we get computation for p[29<x<39]
When we take the integrals with x = 1/25
We get
Probability that it takes Robby between 29 and 39 minutes to go shopping to be 0.4
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Answer:
Explanation:
I think your question is missed of key information, allow me to add in and hope it will fit the original one. Please have a look at the attached photo.
Given:
- Cost $71 per linear foot
- Budge $34080 for those walls
Let X is the the length
Let Y is the width
From the photo, we can see that
(4X + 6Y)*71 = 34080
<=> (4X + 6Y) = 480
<=> Y = 80 - X
The are of the rectangular industrial warehouse:
A(X) = 3Y*X
<=> A(X) = 3(80 - X )X
<=>A(X) = (240-2X)X = 240X -
So A'(X) = 240 - 4X
Let A'(X) = 0, we have:
240 - 4X = 0
<=> X = 60
=> Y =(80 - X ) = 80 -
*60 = 40
So the dimension to maximize total area is: 60 in length and 40 in width
