A good quaterback can throw a football with great accuracy, judging time and distance to his receivers. The quadratic function used to show the height of the ball tossed with respect to time t is
h(t) = -16t2+v0 . t + h0 where v0 is the initial velocity at which the ball is thrown and h0 is the initial
height of the ball. Let's say the quaterback is 6 feet tall and he throws the ball at an initial velocity of 42 feet
per second. Which of the following represents the best estimate of the height of the football 2 seconds after
it is thrown by the quaterback?