Pls help extra points and mark brainlist

Convert the cartesian equation (x 2 + y 2)2 = 4(x 2 - y 2) to a polar equation. choices: r4 = -4r2 r2 = 4cos2θ r2 = 4sin2θ

What is the exact volume of the cylinder (radius 13 in., height 30 in.)

The cost of using a service is $0.25 per min. what equation correctly represents the total cost c, in dollars, for d days of use?