A rock is thrown at an initial velocity of 80 feet per second.

Model this situation using a modification of the inequality from (see [ ]).

For what periods of time is the rock lower than 60 feet in the air?

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[A rock was thrown up into the air from the ground with an initial velocity of 64 feet per second.

The height of the rock can be described by the function (see picture) where t is the time in seconds and h is the height of the rock in feet.

For what period of time was the rock higher than 60 feet in the air?]

(This should be answered in one of my other posts.)
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