4. Henry is diving off a diving board that is 7m above the water. After 2 seconds, he reaches his maximum
height of 9m above the water. What height will Henry be after 5 seconds?

Determine possible value(s) of k such that h = kx² + 4x + 5 has only one x-intercept. Show all work
clearly. Guess and check is not an acceptable method.

6. Goodlife charges its members $30 per month for a gym membership. They currently have 75 clients.
Research has shown that for every $2 increase in their membership price they will lose 3 clients. If they
want to maximize their revenue, how much should Goodlife charge per membership? What will their
maximized revenue be? (Include Let Statements in your solution).