Respuesta :

f(t) = 4t² - 8t + 8 

f(t) = 4(t² - 2t + 2)

f(t) = 4(t² - 2t + 1² -1² +  2)

f(t) = 4((t - 1)²  + 1)

f(t) = 4(t - 1)²  + 4

Answer : The equation is f(t) = 4(t - 1)²  + 4 and the minimum height is 4m from the ground.