business calculus finding revenue

The owner of a luxury motor yacht charges $500/person/day if exactly 15 people show up for the cruise. However, if more than 15 people sign everyone's fare is reduced by $3 for each additional passenger. Assume that at least 15 people sign up for the cruise.

A) Find the revenue function.

B) What is the number of people that will result in the maximum revenue?

C) What is the maximum revenue?

D) What is the fare per person in this case?

Please show work if you can. Really need some help with this one. Thanks!!

Re: business calculus finding revenue

It doesn't help to post the same thing more than once!