120=(n-2)*180/n find n

The volume of a cube is 8 in to the 3rd power. how long is each side?

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 =

Ineed with number 6 , explain how to get 1978