Question

A) 12

B) 5

C) 8

D) 20

E) 10​

Answer 1

Vamos lá.

H(t) = -4t²/5 + 8t

derivada

H'(t) = -8t/5 + 8 = 0

8t/5 = 8

t = 5

H(5) = -20 + 40 = 20

alternativa D)