PLEASE HELP The function f(x) = 240x represents the cost of staying at a particular hotel for x nights at the full room rate of $240 per night. The hotel gives its rewards members a discount based on the length of their stay. Each additional night that rewards members stay earns them an additional 5% discount on the total cost of their stay up to a 30% discount. The function d(x) = 0.05(x-1) for 1 < x< or equal to 7 represents the percentage discount in decimal form for a rewards member staying x nights at the hotel.
(a) Write an equation in simplified form to represent (fd)(4) .
(b) Evaluate (fd)(4) , and explain what this value represents.