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Warmup Problems for 12/12/12 1. The Johnsons need a new living room couch. The couch they like costs $2,700. The salesperson told the Johnsons that the couch will be on sale next month for 20% off. If the sales tax rate in their city is 7.5%, how much will the Johnsons save, including sales tax, if they wait until the couch goes on sale? A. $40.50 B. $540.00 C. $580.50 D. $2,160.00 2. Mr. and Mrs. Dawson's son Josh weighed 28 pounds on his second birthday. On his eighth birthday, Josh weighed 56 pounds. What is the percentage increase in Josh's weight from his second birthday until his eighth birthday? A. 28% B. 50% C. 84% D. 100%

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Answers to Pg. 176 #4-16

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4.4: Simple Interest

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Simple Interest

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Example 2 You borrow $2500 at 6.9% annual simple interest. You will pay the loan off in 42 months. Find (a) the simple interest and (b) the balance of the account.

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Percents A Percent is a ratio that compares a number to 100. The symbol for percent is %. You can write percents as fractions and decimals. 36% as a decimal.

Percents A Percent is a ratio that compares a number to 100. The symbol for percent is %. You can write percents as fractions and decimals. 36% as a decimal.

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