<span> 20% of 40 is 8. so 40</span>
1) Type of motion: constant acceleration.
2) acceleration, a = 9.8 m/s^2
3) time up = time down = 4seconds / 2 = 2 seconds
4) formula = Vf = Vo - a*t^2/2
Vf = 0 => Vo = a*t^2 / 2 = 9.8m/s^2 * (2 s)^2 / 2 = 19.6 m/s
Answer: 19.6 m/s
Idk but it can't be 10 or 9.7 bc a triangle's hypotenuse is always longer than its legs
Answer: The answer is -3 1/2 - 1/5
so it's C.
Step-by-step explanation:
