For which interval(s) is the function increasing and decreasing?

y = 3x^3 - 16x + 2

Please show your work. Thanks.

What is not true about kl and mn? what is mn? (show your work)

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 =

What expression is equivalent to log3(x+4)