One and two step equations error analysis.

Please help me.

Julia is going for a walk through the neighborhood. what unit of measure is most appropriate to describe the distance she walks?

Given abcd ac=38 and ae=3x+4 find the value of 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 =