Polynomial Functions and Rates of Change Practice Test

A population model is $N(t)=0.3t^3-2t^2+4t+10$; the rate is $N'(t)$. What is the instantaneous rate of change at $t=5$?​

A rocket’s height is $h(t)=-5t^2+30t+2$ (meters), and velocity is $h'(t)$. How does the rate of change change on the interval $1,4$?​