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Home Q & A Board Science-Related Homework Help Mathematics Pre-calculus and Functions
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ccnnieeee ccnnieeee
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5 years ago
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5 years ago
Hi ccnnieeee

Please type out the question (or copy-paste it) next time, would appreciate it a lot! I've answered question (1) underneath.

So, they want the volume. V = l*w*h for a rectangular prism

L = 12 - 2x
W = 9 - 2x
H = x

Substitute into the formula for volume:

f(x) = V = (12 - 2x)(9 - 2x)(x)
f(x) = 4x^3 - 42x^2 + 108x

Attached for clarity:

Also, if you're being asked to maximize, use this video:
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