Quadratic Function Applications

To calculate the TIME that a maximum height occurs, you should use: 

• -b/(2a) 

• Quadratic formula 

• the c value 

• 0

To calculate the maximum height, you should: 

• Use the time you got from -b/(2a) and plug it in for each "t" 

• -b/(2a) 

• use the c value 

• use the b value 

A soccer ball is kicked from the ground with an initial upward velocity of 90 feet per second. The equation h=-16t² + 90t gives the height h of the ball after t seconds.
What is the maximum height of the ball?

• 126.56 ft

• 5.625 sec

• 2.81 sec

• 90 ft

A soccer ball is kicked from the ground with an initial upward velocity of 90 feet per second. The equation h=-16t² + 90t gives the height h of the ball after t seconds.
How many seconds will it take the ball to hit the ground?

• 126.56 ft

• 5.625 sec

• 2.81 sec

• 0 ft

• 22 meters

• 1.89 seconds

• 2 seconds

• 2 meters

• 18 meters

If each mark on the x-axis represents one second, when did the object reach the ground?

• 2.5 seconds

• 6 seconds

• 5.5 seconds

• 5 seconds

Q1. What is the height of the building?

• A) 240 ft

• B) 256 ft

• C) 265 ft

• D) 230 ft

Suppose this graph models a golf ball being hit out of a sand trap. How long is the golf ball above ground for?

• .75 seconds

• .5 seconds

• .25 seconds

• .6 seconds

Suppose this graph models the path of a basketball that was thrown. How long did it take for the basketball to hit the ground?

• -1 seconds

• 4 seconds

• 0 seconds

• 1.5 seconds