a volleyball reaches its maximum height of 13 feet, 3 seconds after its served. Which of the following quadratics could model the height of the vollyball over time after it is served. Select all that apply.A: f(x)=2x^2+12x+5B: f(x)=-2x^2+12x-5C: f(x)=-2x^2-12x+5D: f(x)=-2(x-3)^2+13E: f(x)=-2(x+3)^2+13
Accepted Solution
A:
Only selections B and D give a maximum height of 13 at t=3. However, both of those functions have the height be -5 at t=0, meaning the ball was served from 5 ft below ground. This does not seem like an appropriate model.
We suspect ... • the "correct" answers are probably B and D • whoever wrote the problem wasn't paying attention.