What is 7/8 written a a decimal

Can someone me with these two circle theorem questions asap?

Segment wx is shown explain how you would construct a perpendicular bisector of wx using a compass and a straightedge

Find the product. type your answer in the space provided. use / for a fraction bar (example: 1/2) and ^ for an exponent (example: x^5). do not put spaces in your answer. (x -1 y 5)^2 · (2xy -2)^5