Trig word problem

Question

A car is driven 30 mph for 2 hours, 55 mph for the next 5 hours, 20 mph for the next hour. Which function best represents the distance the car traveled?

B) d(t)= {30t if 0<=t<=2

{55t if 2<t<=7

{20t if 7<t<=8

D) d(t)= {30t if 0<=t<=2

{55t-50 if 2<t<=7

{20t+195 if 7<t<=8

Which one is it?

Answer 1

The answer is D. The functions as stated take in to account the mileage driven previously.