The Velocity of a car is given by v(t)=120(1-0.85^t)
How can i calculate the average and instant acceleration of the car in the first 5 seconds/
average acceleration from $\displaystyle t = 0$ to $\displaystyle t = 5$ ...
$\displaystyle \bar{a} = \frac{v(5)-v(0)}{5-0}$
understand that the instantaneous acceleration calculation requires calculus.
$\displaystyle a(t) = v'(t)$
What do you know about derivatives of exponential functions?