13. Velocity If 30') denotes the position of an object that moves along a straight line, then Mint, called the average velocity, is the average rate of change of 30), and v(t) = dsfdt, called the (in- stantaneous) velocity, is the instantaneous rate of change of s(t). The speed ofthe object is the absolute value of the velocity, ]v(f)|. Suppose now that a car moves along a straight road. The lo- cation at time t is given by 160 where t is measured in hours and s(.!') is measured in kilometers (3) 1Where is the car at: = SM, and where is it at t = 1'? (I3) Find the average velocityr of the car between t = 3M and f r: 1. (c) Find the velocity and the speed of the car at! = 3M