According to the definition of power, a powerful person is able to do which of the following?
a. lift heavy objects
b. do less work in more time
c. do more work in less time
d. exert a larger force for a longer time

Power is energy per unit time. If he is powerful, it means he can spend more energy in short span of time, so option C ( i.e. do more work in less time) is correct.

Indoraptor for sure

Initial velocity,  u = 4.9 m/sfinal velocity = v m/sinitial height,  h₁ =  245 m    final height, h₂ = 0a = -9.8  m/s²time taken = t secondss = ut + 0.5at²⇒  (h₂-h₁) = ut + 0.5at²⇒  0-245 = 4.9t + 0.5×(-9.8)×t²⇒ -245 = 4.9t - 4.9t²⇒ 4.9t² -4.9t -245 =0solving it, we get   t = 7.59sv  = u +  at = 4.9 -9.8×7.59 = 4.9 - 74.38 = -69.48 m/svelocity is  69.48 m/s downward