Questions:

1. Using the formula, find the time when Vladimir was 15 feet off of the ground. Check your work by using the interactive application.
   
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2. If Sergio hopes to match his teammate, Vladimir, what is the time of the vault from beginning until at maximum height? State your answer using decimal format rather than fraction format.
   
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3. The pattern of the pole vault creates a parabola where height is duplicated on both sides of the maximum point. At what time, in decimal format, is Vladimir at 10 ft. on the downward side of his vault?
   
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4. How many seconds are between the maximum point of Vladimir’s vault and when he is at the 10-foot mark coming back down to the ground?
   
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