A rockets height above ground is modeled by \(h(t)=-4.9t^2+9.8t\)

1) When is the rocket travelling 9.8 m/s down?

2)When is the rocket travelling 9.8 m/s down?

3) What is the average speed of the rocket over the first second?

Are these questions asking to find the acceleration?what formulas can i use to solve?

bioplant Apr 9, 2020