Answer:
He will have $48 left and he can take 14 trips before his account is empty.
Step-by-step explanation:
A(t) = 224 - 16t
A(t) = 224 - 16 x 11
A(t) = 224 - 176
A(t) = 48
16t = 224
16 x 14 = 224
224 = 224
