I BEG FOR MY LIFE EZ PLS

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Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

If a flying disk is 139 meters in the air and travels at an average of 13 m/s how long is it in the air