Suppose the revenue (R), in dollars, from selling (x) clocks is . The cost (C), in dollars, of selling (x) clocks is C(x)=0.1^2+7x+400. Find the profit function P(x).
Profit function, P(x) = revenue (R)- cost (C)
"P(x)=x-(0.1x^2+7x+400)=-0.1x^2-6x-400"
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