What would be the best question to ask if you wanted to learn more about someone's job? How much did your last car cost? What's the best vacation you've ever taken? What do you like to do on the weekends? What school subjects would help me get your job?

You're asking in the ap section, so i'll give the ap calculus-style answer. alternatively, you can find the vertex of the parabola and use the "y"-coordinate as the answer.

the maximum height can occur at a critical number, that is, a number  such that  .

the derivative of  can be calculated as follows:



find a value of  that is a zero of the derivative:


this is parabola that is opening downward; we can assume there is a maximum at  .

to find that maximum, calculate  .