Let a be a nonzero rational number. Is rational or irrational? Prove your answer by picking a value for a and simplifying the expression. Then explain your reasoning.

If c(x) = 4x – 2 and d(x) = x2 + 5x, what is (cxd)(x)

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 =

Aplot of land has been surveyed for a new housing development with borders ab, bc, dc, and da. the plot of land is a right trapezoid with a height of 60 feet and an opposite leg length of 65 feet