Answer:
x = 59.4 ft
y = 84.18ft
Step-by-step explanation:
The cost of exterior walls is $150 per linear foot.
The cost of interior walls is $100 per linear foot.
xy = 5000
y = 5000/x
For the exterior walls, we have 2(x+y)(120)
For the interior wall, we have 100x
The cost function = C
C = 2(x+y)(120) + 100x
C= 240(x+y) + 100x
= 240x + 240y + 100x
= 340x + 240y
Recall that y = 5000/x
C = 340x + 240(5000/x)
C = 340x + 1200000/x
Differentiate C with respect to x
C'(x) = 340 - 1200000/x^2
= (340x^2 -1200000) / x^2
To minimize cost C'(x) = 0
(340x^2 -1200000) / x^2 = 0
340x^2 -1200000 = 0
340x^2 = 1200000
x^2 = 1200000/340
x = √1200000/340
x = 59.4 ft
Recall that y = 5000/x
y = 5000/59.4
y = 84.18 ft
Answer:
B. 0.73
Step-by-step explanation:
Add all numers so the first is 2/10 = 0.2
then 35/100 = 0.35
and then 16/100 = 0.16
finally 2/100 = 0.02
Now add all decimals which is equal to 73/100 = 0.73 and that's your answer.
^Virtuoso^
I think reflection over y axis , the y axis Is vertical.
Hi there!
First, let's figure out how many feet are in the total amount of tape. This can be done by multiplying the amount of yards (4) and multiplying it by the amount of feet in a yard (3). This gives us 12 feet. Then, we need to subtract the amount of feet that are left (2). This gives us 10 feet.
ANSWER:
B - 10 feet
Hope this helps!! :)
If there's anything else that I can help you with, please let me know!
