Question

Kenny is standing on top of a boulder at his neighborhood pond. He picks up a small rock, so that it is 7 feet off the ground, and throws the rock into the pond. The height of the rock after t seconds can be modeled by the expression −16t^2+32t+7. What does 7 represent in the context of the problem?

7 does not make sense as a value in this problem.

7 represents the number of seconds Kenny hold the rock before throwing it.

7 represents the number of rocks Kenny found at the pond.

7 represents the height of the rock when Kenny throws it.

Answer 1

In the context of the problem, the value of 7 represents the height of the rock when Kenny throws it. Specifically, it indicates that the rock is initially 7 feet off the ground at the moment it is thrown. Thus, the correct interpretation is:

**7 represents the height of the rock when Kenny throws it.**