Please help I'm not 100% sure on this answer!! If the diameter of a cylinder is 6 yards, then the value of r 2 is 9 square yards.

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Aball is thrown from a height of 139 feet with an initial downward velocity of 15 ft/s. the ball's height h (in feet) after t seconds is given by the following. h=139-15t-16t^2 how long after the ball is thrown does it hit the ground? round your answer(s) to the nearest hundredth. (if there is more than one answer, use the "or" button.) t =

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?

Write the expression as a single natural logarithm. 2 in a - 4 in y