V = At A confectioner is applying a sugar coating to some spherical candies. The above equation gives a
good approximation of the volume of coating, V. in cubic millimeters (mm), needed for a
coating that is t mm thick on a candy with a surface area of A mm. For a coating volume of
207 mm and a coating thickness of 0.2 mm, which of the following best approximates the
radius of these candies? Use 7 3.14, and round your answer to the nearest hundredth of a
millimeter.
The surface area of a sphere can be calculated as A = 4 r2.