Answer:
your answer to this question is D
h = -16t^2 + 18t + 4.5 and h = -16t^2 + 21t + 1.5
and the next question:
What does the t-coordinate of the solution to this system represent?
the answer is C!
Hope this helps! can I get brainliest if I deserve it? Thanks! Have a good day! :)