Answer:
He bought 12 books.
Step-by-step explanation:
6 goes into 75 12 times. The remaining 3 was for shipping, so you were correct!
That would be 400 / 28 = 14.29 gallons to nearest hundredth
velocity=distance/time
31.1m/s=70/t
t=70/31.1
t=2.25secs
acceleration=velocity/time
a=31.1/2.25
a=13.82ms-²
therefore the constance deceleration=13.82ms-²