I just got this problem in my class and I have absolutely no idea how to do this please tell me how to do this or post it. Its my last math project and I just want to finally be done. Thank you!

A music store has determined from a customer survey that when the price of each cd is $x, The number of ther cds sold monthly can be modeled by the price funtion as:

p(x)=6250(0.92985)^x

Questions:

1. Find Revenue and plot it against price per Cd.

2. Find Marginal Revenue and plot it against price per cd.

3. Evaluate the Marginal Revenues at 12$, $13.75 and $15 and show it on the plot.