1. 4.8A - Quadratic Formula Applications
Worksheet Key
5/8/2019 2:23 PM
4.8A - Quadratic Formula Applications

2. 4.8A - Quadratic Formula Applications
Worksheet Key
5/8/2019 2:23 PM
4.8A - Quadratic Formula Applications

3. 4.8A - Quadratic Formula Applications
5/8/2019 2:23 PM
4.8A - Quadratic Formula Applications

4. Quadratic Formula Applications
Section 4.8A
5/8/2019 2:23 PM
4.8A - Quadratic Formula Applications

5. 4.8A - Quadratic Formula Applications
5/8/2019 2:23 PM
4.8A - Quadratic Formula Applications

6. 4.8A - Quadratic Formula Applications
Steps
Understand the question
Translate
Solve
Interpret
5/8/2019 2:23 PM
4.8A - Quadratic Formula Applications

7. 4.8A - Quadratic Formula Applications
Example 1
An object is thrown upward from the top of a 200-foot cliff with a velocity of 12 feet per second. The height h in feet of the object after t seconds is h = –16t2 + 12t How long after the object is thrown will it strike the ground? Round your answer to the nearest thousandth of a second.
200 feet
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4.8A - Quadratic Formula Applications

8. 4.8A - Quadratic Formula Applications
Example 1 Calculator
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4.8A - Quadratic Formula Applications

9. 4.8A - Quadratic Formula Applications
Example 2
Smoke jumpers are in free fall from the time they jump out of a plane until they open their parachutes. The function is y = –16t models a jumper’s height y in feet at t seconds for a jump from 1600 ft. How long is a jumper in free fall in the parachute opens at 1000 feet? Round your answer to the nearest ten-thousandth of a second.
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4.8A - Quadratic Formula Applications

10. 4.8A - Quadratic Formula Applications
Your Turn
The height h in feet of a person on a waterslide is modeled by the function, h(t) = –0.025t2 – 0.5t + 5, where t is the time in seconds. At the bottom of the slide, the person lands in a swimming pool. To the nearest thousandth of a second, how long does the ride last?
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4.8A - Quadratic Formula Applications

11. 4.8A - Quadratic Formula Applications
Example 3
A player throws a ball straight up towards the roof of an indoor baseball stadium. The height h in feet of the ball after t seconds can be modeled by the function, h(t) = –16t t. The height of the roof is at 208 feet. When does the ball hit the roof? What is the maximum height that the ball will reach?
5/8/2019 2:23 PM
4.8A - Quadratic Formula Applications

12. 4.8A - Quadratic Formula Applications
Assignment
Worksheet
5/8/2019 2:23 PM
4.8A - Quadratic Formula Applications