Question

Need help with volume.
Please help
I'll post the picture up.

Answer 1

where is the picture

Answer 2

Let the vertical edges have length y
4y+8x=144
4y=144-8x
y=36-2x
V=x(x)(36-2x)
V=x^2(36-2x)
But 36-2x=2(18-x)
V=x^2(2)(18-x)
V=2x^2(18-x)

Answer 3

i get how you id it :)

Answer 4

not really. i'm still a little lost v.v

Answer 5

pre-cal

Answer 6

@genius12 help him, please

Answer 7

@Loser66 Didn't @Mertsj help already.

Answer 8

b is quite easy, but c is not

Answer 9

b) If Volume is positive then the produce of the factors 2, x^2 and 18-x must be positive. 2 and x^2 will always be positive of 18-x must also be positive.
Write and solve this inequality:
18-x>0
That will be your domain.

Answer 10

k

Answer 11

The maximum value of the function will be when x is at a maximum. From solving the inequality 18-x>0 you find that x < 18 so choose a value for x that is less than 18 but very close to 18. Calculate the volume for that value. That will give you an estimate of the maximum volume.

Answer 12

i get the rest, thank you very much :D

Answer 13

yw