Applying the concept. distance formula/ midpoint formula. not sure how to figure this one out. or if i need to use one of the formulas.

Which expressions are equivalent to -6 + 3m

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 =

Identify the initial amount a and the growth factor b in the exponential function. a(x)=680*4.3^x