Problem
< Back See Solution Show Example Record: o/1 Score: 0 Penalty: None Complete: $83 \%$ Richard Gudoski Interpret Quadratics in Context (Graphing Tech) May 26, 1:54:23 AM A tennis ball is dropped from a certain height. Its height in feet is given by $h(t)=-16 t^{2}+400$ where $t$ represents the time in seconds after launch. After how many seconds does the ball hit the ground? Answer: seconds attempt 1 out of 3
Solution
Step 1 ：Set the height equation to 0: \(0 = -16t^2 + 400\)
Step 2 ：Solve for t: \(t = \sqrt{\frac{400}{16}}\)
Step 3 ：\(t = \boxed{5}\)
