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Over a four month period the price of an ounce of gold steadily increased from to . What was the monthly multiplier? What was the monthly percent increase?

First, ask yourself these questions:
What was the initial cost of an ounce of gold? The new price?
How long did it take for the gold to reach the new price?

If is the monthly multiplier, then .

The monthly multiplier is , and the monthly percent increase is .