S is directly proportional to the square of r. When r is increased by 200%, find an expression for the new r. Just need a second opinion.

Question

anonymous · Answer

The answer is 3r, since an increase of 200% is multiplication by a factor of 3.

anonymous · Answer

are you sure it's not r^2 + 2r?

anonymous · Answer

Positive. If you are 3 feet tall and you grow by 0%, then you are still 3 feet tall. If you grow by 100%, you have doubled in height to 6 feet. If you grow by 200%, you've tripled, etc.

anonymous · Answer

I see, good comparison

anonymous · Answer

When in doubt, always just try to think of a real life example :)

anonymous · Answer

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