Subtract 7 from 9. You get 2. It is the "extra". The answer, therefore is 1 2/7
Given
d(t) = 0.8t ^2
t= 5 secs
d(5) = 0.8(5)^2 = 0.8 * 25 = 20
t= 10 secs
d(10) = 0.8(10)^2 = 0.8 * 100 = 80
20 m / 5 secs = 4 meters per sec
80 m / 10 sec = 8 meters per sec
4 mps + 8 mps = 12 mps
12 mps / 2 = 6 mps
6 mps is the average speed of the rock between 5 and 10 sec after being dropped
Answer:
It would be 63 if he traveled 315 miles in 5 hours
Step-by-step explanation:
He was traveling 63 mph
divide 315 by 5 and you get 63
check your answer by multiplying his speed (63mph) by 5 (number of hours)
Answer:
437.4m
Step-by-step explanation:
1 cm = 4.5m
7.2x4.5=32.4
3x4.5=13.5
32.4x13.5 = 437.4m
