Simplify the Rational Expression

question 424

Multiple Choice

Simplify the rational expression. Use factoring, and assume all variable expressions represent positive real numbers.
-The algebraic expression 0.07d3/2 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 10 miles. Round to the nearest hundredth.

• A) 31.62 hr
• B) 0.59 hr
• C) 2.21 hr
• D) 0.22 hr

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