jiangtinanyp2wyu0 jiangtinanyp2wyu0 22-03-2020 Mathematics contestada A sphere has a radius of r. What is the area of a cross section taken at a distance of 1/2r from the center of the sphere? A. 1/4r^2 B. 1/2r^2 C. 1/2pie(r)^2 D. 3/4pie(r)^2
