. The volume of a frustum of a right circular cone is 1176 π cm3 . The altitude of the frustum of the cone is 18 cm. Determine the radius of the smallest base if the product of the radii is 60 cm2 .

The great circle of the sphere below is 16 π m. Find the surface area of the sphere, rounded to the nearest tenth!

Johann made a sculpture by joining two cylinders. As shown below, a cylinder with a radius of 2 centimeters sits on top of a cylinder with a radius of 5 centimeters. 2 cm 8 cm 7cm to 5 cm Which of the following is the best estimate of the surface area of Johann's sculpture? O 477 cm2 O 499 cm? O 578 cm2 О 333 ст?