SOLUTION: use the quadratic formula to determine the times when an object launched vertically from the surface of the earth at an initial speed of 30m/s reaches a height of 20 meters. Includ
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Question 1196882: use the quadratic formula to determine the times when an object launched vertically from the surface of the earth at an initial speed of 30m/s reaches a height of 20 meters. Include a sketch with the solution. Answer by ikleyn(52776) (Show Source):