Question

Como resolver?

h(t)=21t-7t2 sendo t=2

Answer 1

h(t) = 21t - 7t²

h(2) = 21.2 - 7 . 2²

h(2) = 42 - 7. 4

h(2) = 42 - 28

h(2) = 14

Answer 2

h(t)=21t-7t²
sendo t=2

h(2)= 21(2) - 7.(2)²
h(2)= 42- 7.4
h(2)= 42-28
h(2)= 14