Someone help plz will make brainiest:)

The area (a) of a circle with a radius of r is given by the formula and its diameter (d) is given by d=2r. arrange the equations in the correct sequence to rewrite the formula for diameter in terms of the area of the circle.

Matt had 5 library books. he checked out 1 additional book every week without retuening any books. whats the matching equation

Find the area between y=e^x and y=e^2x over [0,1]