Question

S=30+10t-20t2
E)velocidade no t=1s

Answer 1

s(1)=30+10.1-20.(1)^2

s(1)=30+10-20

s(1)=30-10

s(1)=20metros

v=D/t

v=20m/1s

v=20m/s


espero ter ajudado!

boa noite!!!