Assuming that the y-coordinate is given by the distance in km north of the intersection (which is not said in the problem), for A, y= 13- 50t where t is the time in hours after this starting time. With similar assumptions about the x-coordinate, x= 8- 40t.

Pythagorean theorem!B)find an expression for the square of the distance between the two vehicles. differentiate both sides

C) solve for ds/dt=0 and show minimum distance occurs at just under 15 mins fromt=0

D) find distance at this time

e)find the rate of approach at time t=.1hours

what do i need to do?