1. a car travels 363 miles in 2 hours and 45 minutes. Work out the average speed. 2. A car travels at 72 mph for 3 hours and 40 minutes.
How far has it travelled?

Amass weighing 16 pounds stretches a spring 8/3 feet. the mass is initially released from rest from a point 2 feet below the equilibrium position, and the subsequent motion takes place in a medium that offers a damping force that is numerically equal to 1/2 the instantaneous velocity. find the equation of motion if the mass is driven by an external force equal to f(t)=cos(2t).