A Stone Is Thrown into a Pond, Creating a Circular $\pi$

question 150

Multiple Choice

A stone is thrown into a pond, creating a circular wave whose radius increases at the rate of 1 foot per second. In square feet per second, how fast is the area of the circular ripple increasing 3 seconds after the stone hits the water?

• A)\(\pi\)
• B)2\(\pi\)
• C)\(\frac { \pi } { 3 }\)
• D)6\(\pi\)
• E)3\(\pi\)
• F) \(\frac { \pi } { 6 }\)
• G)\(\frac { \pi } { 12 }\)
• H) \(\frac { \pi } { 2 }\)

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Definitions:

Acceptable Name

A name for a chemical substance that follows current nomenclature rules and is agreed upon by scientific organizations.

Compound

A substance made up of two or more different elements that are chemically bonded together in a fixed ratio.

Common Name

The simplified, non-scientific name of a chemical substance or organism that is generally known and used.

Compound

A substance made up of two or more different elements chemically bonded together in a fixed ratio.