An average of 20,00020,000 people visit riverside park each day in the summer. the park charges $18.0018.00 for admission. consultants predict that for each $1.001.00 increase in the entrance price, the park would lose an average of 1,5001,500 customers per day. (a) express the daily revenue from ticket sales, rr as a function of the number of $1.001.00 price increases, xx.