6. Carl wants to become more skilled at identifying problems. Which of the following is good advice for him? He needs to look for ways situations can cause harm or distress to others.
He needs to pay closer attention to the people around him and the actual situations he finds himself in.
He needs to make a list of things he and other people complain about.
He needs to start seeing the negative aspects of everyday situations.

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  .

Combine the and see what you like better!