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Find the half-life of a radioactive substance that decays by 9% in 6 years. (Round your answer to one decimal place.)
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If the ratio of sum of the first m and n terms of an ap is m2 : n2 , show that the ratio of its mth and nth terms is (2m − 1) : (2n − 1).
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Mrs. blake's bill at a restaurant is $42.75. she wants to leave the waiter an 18% tip. how much will she pay in all, including the tip?
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Find the half-life of a radioactive substance that decays by 9% in 6 years. (Round your answer to on...
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