Question: Given a total-revenue function R(x)=800x20.2x and a total-cost function C(x)=1400x2+313+900, both in thousands of dollars, find the rate at which total profit is changing when

Given a total-revenue function

R(x)=800x20.2x

and a total-cost function

C(x)=1400x2+313+900,

both in thousands of dollars, find the rate at which total profit is changing when x items have been produced and sold.

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