Real World Quadratics

• 201 feet

• 10.06 feet

• 36 feet

• 81 feet

• 39 feet

• 11 feet

• 6.5 feet

• 10.06 feet

• 1.12 seconds

• 5.61 seconds

• 6.5 feet

• 5.125 seconds

• 39 feet

• 11 feet

• 6.5 feet

• 81 feet

• 81 feet

• 11 feet

• 6.5 feet

• 39 feet

Mrs. Martone's 7th grade science class built and launched rockets. The graph below shows the height, in feet, over time, in seconds, of a student's rocket. Use the graph to answer the questions below. What is the height of the rocket at 5 seconds?

• 30 feet

• 60 feet

• 65 feet

• 70 feet

Tags

CCSS.8.EE.B.5

Jason jumped off of a cliff into the ocean in Acapulco while vacationing with some friends. His height as a function of time could be modeled by the function h(t) = –16t² + 16t + 480, where t is the time in seconds and h is the height in feet. How long does it take Jason to hit the water?

• -16 seconds

• -6 seconds

• 0 seconds

• 5 seconds

If a toy rocket is launched vertically upward from ground level with an initial velocity of 128 feet per second, then its height, h, after t seconds is given by the equation h(t) = 16t² - 128t. How long does it take the rocket to hit the ground?

• 8 seconds

• 16 seconds

• -16 seconds

• -8 seconds

A diver is standing on a platform above the pool and jumps from the platform with an initial upward velocity of 8 ft/s. Using the formula h = −16t² + 8t + 24, where h is the diver's height in feet above the water and t is the time in seconds, what is the height of the platform?

• 8 ft

• 16 ft

• 24 ft

• 32 ft