What do i need to do and what the answer

What is the volume of a rectangular prism if the length is 10.4 mm the width is 5 mm in the height is 8 mm

For what values of x is x2 + 2x = 24 true?

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 =