A baseball is thrown upwards from a height of 5 feet with an initial speed of 64 feet per second, and its height h (in feet) from the ground is given by h(t) = 5 + 64t – 16t2 as shown in the graph where t is time in seconds. Using a graphing calculator, at what time does the ball reach its maximum height?
A: 0
B: 1
C: 2
D:3

Question

A baseball is thrown upwards from a height of 5 feet with an initial speed of 64 feet per second, and its height h (in feet) from the ground is given by h(t) = 5 + 64t – 16t2 as shown in the graph where t is time in seconds. Using a graphing calculator, at what time does the ball reach its maximum height?
 A: 0
B: 1
C: 2
D:3

anonymous · Answer

If you would like to use a graphing calculator, plug in your equation by hitting the y= button and then graph it. You can graph it on your own, but then you would need to find the axis of symmetry, y-intercept, and vertex. Alternatively, you can simply plug in your choices and see which gives you the greatest value.