In this question, we are told to calculate the height after the third bounce. From the question, we are made to know that x represents the bounce number.
Thus, mathematically we just plug the value 3 into the exponential equation.
f(x) = 4.5(0.65)^x
f(3) = 4.50(0.65)^3 = 1.2358125 which is approximately 1.24
