1. The problem statement, all variables and given/known data A balloon is rising at a constant speed of 5ft/s. A boy cycling along a straight road at a speed of 15 ft/s. When he passes directly under the balloon, it is 45 ft above him. how fast is the distance between the boy and the balloon increasing 3 seconds later? 2. Relevant equations s^2= x^2+y^2 dx/dt = 15ft/s; dy/dt = 5ft/s 3. The attempt at a solution 2s(ds/dt)=2x(dx/dt)+2y(dy/dt) Now, the problem is, how do i find the general equation for me to pluck in the t?