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In 10 years, kellie will be 20 years younger than 3 times her current age. What is kellies current age?
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The distribution of the amount of money spent by students for textbooks in a semester is approximately normal in shape with a mean of $235 and a standard deviation of $20. according to the standard deviation rule, how much did almost all (99.7%) of the students spend on textbooks in a semester?
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In 10 years, kellie will be 20 years younger than 3 times her current age.
What is kellies current...
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