The function f(t) = -16t2 + 32t +42 gives the height h (in feet) of water from a fountain t seconds after it leaves the spout. When does the water reach its maximum height? What is the maximum height?

Ms.ortiz sells tomatoes wholesale. the function p(x)=-80x^2+320x-10, graphed below, indicates how much profit she makes on a load of tomatoes if she makes on a load of tomatoes if she sells them for 4-x dollars per kilogram. what should ms.ortiz charge per kilogram of tomatoes to make on a load of tomatoes?