Answer and explanation pls​

Write an inequality for this description. - one fourth of the opposite of the difference of five and a number is less than twenty.

A0.40 kg soccer ball is kicked so that its incoming velocity of 5 m/s is changed to an outgoing velocity of -25 m/s. what impulse does the player apply to the ball?

Find the volume of the wedge cut from the first octant by the cylinder z=12-3y^2 and the plane x+y=2.