Awaterfall has a height of 1500 feet. a pebble is thrown upward from the top of the falls with an initial velocity of 20 feet per second. the height, h, of the pebble after t seconds is given by the equation h=-16t+20t+1500. how long after the pebble is thrown will it hit the ground?

If you can copy the equation correctly, a graphing calculator can tell you the height (h) will be zero when t is about 10.328.

The pebble will hit the ground (h=0) about 10.328 seconds after it is thrown.

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You want to find t that makes h=0, so you are looking for solutions to

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step-by-step explanation: