A cart rolls down a hill, traveling 5 inches the first second and accelerating so that during each successive 1 -second time interval, it travels 7 inches more than during the previous 1 -second interval. The cart takes 30 seconds to reach the bottom of the hill. How far, in inches, does it travel?
Answer Choices
A. 215
B. 360
C. 2992
D. 3195
E. 3242