TICKET SALES Last year, a zoo sold 9,000 family passes for $180 each. The
financial analyst for the zoo estimates that every increase of $10 per pass
will cause a decrease of 300 passes sold.
a. Define variables and write a function to represent the situation.
b. How much should each family pass cost to maximize the revenue from
sales?
c. Find the domain and range in the context of this situation.