Marting throws a baseball upwards at a velocity of 80 ft/sec. The following equation models this situation: H (t) = -16t squared + 80t + 6 , where H(t) is the height of the ball in feet and t is the time in seconds after the ball was released. HOW LONG WILL IT TAKE THE BALL TO REACH ITS PEAK (highest point)?
equivalent to finding the vertex of the parabola
h = -16t^2 + 80t + 6
the t of the vertex is -b/(2a) = -80/-32 = 2.5 seconds