
Quadratic Real World
Authored by Anthony Clark
Mathematics
9th Grade

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15 questions
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1.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A ball is thrown into the air with an upward velocity of 100 ft/s. Its height, h, after t seconds is given by the function
h = -16t2 + 64t + 960.
When did the ball hit the ground?
10 seconds
2 seconds
5 seconds
7 seconds
2.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The height of a water balloon that is launched into the air is given by h(t) = -5t2 + 20t + 25. When will the balloon explode on the ground?
5 seconds
1 second
2 seconds
3 seconds
3.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The profit from selling local ballet tickets depends on the ticket price. Using past receipts, we find that the profit can be modeled by the function where p is the profit and x is the number of tickets sold:
p= -15x2 + 600x + 60
What is the maximum profit you can make from selling tickets?
$6060
$20
$600
$10,250
4.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
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
5.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
A ball is thrown into the air with an upward velocity of 40ft/s. Its height h in feet after t seconds is given by the function : h(t) = -16t^2 + 40t + 10 How many seconds does it take the ball to reach its maximum height?
1.25 seconds
1.4 seconds
2.5 seconds
2 seconds
6.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
2.25
5.5
11
21.1
24.3
7.
MULTIPLE CHOICE QUESTION
1 min • 1 pt
The graph represents the height of a baseball, h, in feet as a function of time, t, in seconds after it was hit by a baseball player. Approximately how many seconds does it take for the ball to reach the maximum height?
~ -0.1 seconds
~ 2 seconds
~ 68 seconds
~ 4.1 seconds
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