From 4 feet above a swimming pool Susan throws a ball up word with a velocity of 32 ft./s. The height h(t) of the ball t seconds after Susan throws it is given by h(t)=-16t^2+32t+4. For >_0 find the maximum height reached by the ball at the time that the height is reached.

The temperature of a chemical solution is originally 21 ? c . a chemist heats the solution at a constant rate, and the temperature of the solution 75 ? c after 1212 12 minutes of heating. the temperature, tt t , of the solution in ? c is a function of x , the heating time in minutes. write the function's formula.