The original price of a new pair of shoes is $40. if there is a 20% discount on all shoes, how much is deducted from the original price? urgent

Evaluate cos2θ for cosθ = square root of 3/2

Plz hurry finals a paper cup in the shape of an inverted cone is 8 inches tall and has a radius of 1.5 inches. how much water can the cup hold? use 3.14 for pi. round the answer to the nearest tenth. a) 12.6 cubic in. b) 18.8 cubic in. c) 37.7 cubic in. d) 56.5 cubic in.

What is the equation of a line that passes through points (0, 4) and (-4,-8)?