An object is thrown upward at a speed of 58 feet per second by a machine from a height of 17 feet off the ground. The height h of the object after t seconds can be found using the equation h = -16t^2 + 58t + 17.
When will the height be 30 feet? Select an answer: seconds, per foot, feet per second, seconds, feet.
When will the object reach the ground? Select an answer: feet, seconds, per foot, seconds, feet per second.