$10.75 x 3 1/2 = $37.625 (rounded to the nearest cent: $37.63). $10.75 x 5 = $53.75. $37.625 + $53.75 = $91.375. (rounded to the nearest cent: $91.38) hope this helps
Vol of sphere =4/3πr³ let the radius of cone be x. vol of cone =1/3πx²h when h=r, =1/3πrx² since they have the same volume, 4/3πr³=1/3πrx² 4πr³=πrx² x²=4r² x=2r (radius)