Simplify the Rational Expression $$0.07 \mathrm {~d} ^ { 3 / 2 }$$

Simplify the rational expression. Use factoring, and assume all variable expressions represent positive real numbers.
-The algebraic expression $$0.07 \mathrm {~d} ^ { 3 / 2 }$$ describes the duration of a storm, in hours, whose diameter is d miles. Use a calculator to determine the duration of a storm with a diameter of 13 miles. Round to
The nearest hundredth.

A) 0.87 hr
B) 46.87 hr
C) 3.28 hr
D) 0.25 hr