Answer:
The answer is B:three times as much.
Explanation:
D. Nine times as much.
The correct answer is F
58 cm/s
0.5×129=0.5×(-45)+1.5×V
V=58
3 m/s
Average Speed =
Plug in the numbers, it will be (6m + 3m) divided by (2s + 1s), which is 9m/3s, which equals to 3m/s.