1. Acceleration If the formula describing the distance s (in feet) an object travels as a function of time (in seconds) is
s = 100 + 160t - 16t2
what is the acceleration of the object when t = 4?
2. Revenue The revenue (in dollars) from the sale of x units of a certain product can be described by
R(x) = 100x - 0.01x2
Find the instantaneous rate of change of the marginal revenue.