A: The performer is launching the t-shirt from the court (ground level). We can tell this because the initial height of the t-shirt is 0 feet when t = 0. The height of the t-shirt in feet can be modeled by the function h(t) = -16t^2 + 80t.
B: To find out when the shirt will reach you, we need to solve for t in the equation h(t) = 64. Substituting h(t) with 64, we get 64 = -16t^2 + 80t. Solving this quadratic equation, we get two solutions: t = 1 and t = 4. Since it doesn’t make sense for the shirt to reach you before it’s launched (t < 0), we can conclude that the shirt will reach you after 4 seconds.