3/4 of a sphere with a radius of 13
first fnd SA then times 3/4SA of sphere=4pir^2r=13SA=4pi13^2SA=4pi169SA=676pitimes 3/4SA=507pianswer is 507piĀ squaer units(if they want to evaluate or aprox, use 3.14 for pi and multiply 507 and 3.14)