If during tossing, the dough maintains the shape of a cylinder and the radius is increasing at a rate of {{MATH_18}} cm/min, how fast is its thickness changing when the radius is {{MATH_19}} cm? {{CMD_20}} First, we {{CMD_21}}introduce the variables{{CMD_22}} {{MATH_23}}, {{MATH_24}}, and {{MATH_25}}, denoting the volume, the radius, and the thickness of the pizza, in that order. We {{CMD_26}}identify{{CMD_27}} the given rate {{MATH_28}} cm/min and the unknown rate {{MATH_29}}, when {{MATH_30}}.