Aldo spends $16 each time he travels the toll roads. He started the month with $240 in his toll road account. The amount, A (in dollars), that he has left in the account after t trips on the toll roads is given by the following function. A (t) = 240-16t Answer the following questions. (a) How much money does Aldo have left in the account after 11 trips on the toll roads? $0 (b) How many trips on the toll roads can he take until his account is empty? trips