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Hi! I am having issues with this excercise. Can you please help? A company projects that its total savings S(in dollars) by converting to asolar-heating

Hi! I am having issues with this excercise. Can you please help?

A company projects that its total savings S(in dollars) by converting to asolar-heating system with asolar-collector area A(in m2) will be equal to the formula below. Find the area that should give the maximum savings and find the amount of the maximum savings.

S=420A-0.20A^3

What is the Area that maximizes the savings?

_____M^2 (Round to the nearest square meter as needed)

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