Quadratic Projectile

The graph below shows the height of a ball versus time for one bounce. For how many seconds was the ball at a height of 7 feet or more above the ground?

• 0.25 seconds

• 1 second

• 1.5 seconds

• 1.75 seconds

State the vertex of the graph below.

• (-1⅔, -2⅔)

• (-1⅓, -2⅔)

• (-2⅓, -3⅔)

• (-2⅔, -1⅓)

The height of a water balloon that is launched into the air is given by h(t) = -5t² + 40t + 2. From what height was the balloon released?

• 2 meters

• 5 meters

• 40 meters

• 20 meters

• 144 ft.

• 1232 ft.

• 272 ft.

• 264 ft.

• 36 ft.; No

• 38ft.; No

• 44 ft.; Yes

• 42 ft.; Yes

• 1.36 seconds

• .78 seconds

• 1.77 seconds

• 1.21 seconds