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**haddad287** I dont understand this question. Can you please tell me how to do the question, and help me with doing it?

The demand function for snack cakes at a large bakery is given by the function $\displaystyle p(x) = \frac{15}{2x^2+11x+5}$. The $\displaystyle x$-units are given in thousands of cakes, and the price per snack cake, $\displaystyle p(x)$, is in dollars.

a) Find the revenue function for the cakes

b) Estimate the marginal revenue for $\displaystyle x=0.750$. What is the marginal revenue for $\displaystyle x=2.00$?