Find the demand function for the marginal revenue function. Recall that if no items are$$ sold, the revenue is $0.$

Upper R prime left parenthesis x right parenthesisR$($x$)$equals$=400$ minus $0\mathrm{.}15$ StartRoot x EndRoot$4000\mathrm{.}15$x

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Part $1$

Write the integral that is needed to solve the problem.

Integral$$left parenthesis nothing right parenthesisenter your response here

dx

Part $2$

The demand function for the marginal revenue function

Upper R prime left parenthesis x right parenthesisR$($x$)$equals$=400$ minus $0\mathrm{.}15$ StartRoot x EndRoot$4000\mathrm{.}15$x

is

pequals$=$enter your response here.