Help please,
The height in feet, h, reached by a projectile after t seconds is given by the function:
h(t) = -16t2 + 110t + 5

During what time interval did the projectile reach an altitude of at least 135 ft? When will it hit ground level? Round to 2 decimal places.

Question

Help please,
The height in feet, h, reached by a projectile after t seconds is given by the function:
h(t) = -16t2 + 110t + 5

During what time interval did the projectile reach an altitude of at least 135 ft? When will it hit ground level? Round to 2 decimal places.

uri · Answer

If we plot h(t) vs. time, it will look like a parabola.
Let me sketch that on the board:

uri · Answer

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