
Quadratic Functions Real World Problems
Authored by Anthony Clark
Mathematics
9th Grade

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10 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Fireworks are fired from the roof of a 100-foot building. The equation h = -16t2 +84t + 100 models the height, h, of the fireworks at any given time, t. How high do the fireworks get?
2.625
6.25
100
200
210.25
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Your friend passes you the ball during a soccer game. The height off the ground is modeled by the equation
h = -4t2 + 12t. How high did the soccer ball get?
1.5
3
5
9
15
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The height of a ball Doreen tossed into the air can be modeled by the function h(x) = −4.9x2 + 6x + 5, where x is the time elapsed in seconds, and h(x) is the height in meters. The number 5 in the function represents
the initial height of the ball
the time at which the ball reaches the ground
the time at which the ball was at its highest point
the maximum height the ball attained when thrown in the air
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
You and some friends went to a haunted house on Halloween. The mummy scared one friend so much that she jumped into the air! The equation h = -4t2 + 2t models her jump where h is her jump's height in feet t seconds after the mummy scares her. When did she reach her maximum height?
0.1 seconds
0.25 seconds
0.50 seconds
1 second
2 seconds
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The height of a water balloon that is launched into the air is given by h(t) = -5x2+20x+25. When will the balloon explode on the ground?
5 seconds
1 second
2 seconds
3 seconds
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
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
When will the object reach its maximum height?
4 ft
0 seconds
0 ft
4 seconds
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
Solve the word problem: How fast would you reach the water if you jump of a cliff using the formula: h(t) = -16t2 + 8t + 24?
8
1
1.5
1/4
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