The function h(t)=400-16t^2 gives the height of the supply bundle (in feet) t seconds after it is dropped from a height of 400 feet. a. Find the derivative of this function at the point (3,256).
b. What does your answer tell you about the speed at which the supply bundle is falling?

In angle pqr find the measure of

Apinhole camera is made out of a light-tight box with a piece of film attached to one side and pinhole on the opposite side. the optimum diameter d(in millimeters) of the pinhole can be modeled by d=1.9[ (5.5 x 10^-4) l) ] ^1/2, where l is the length of the camera box (in millimeters). what is the optimum diameter for a pinhole camera if the camera box has a length of 10 centimeters

These tables represent a quadratic function with a vertex at (0, -1). what is the average rate of change for the interval from x = 9 to x = 10?