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Mathematics, 21.06.2019 20:00
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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Mathematics, 21.06.2019 22:30
The difference of three and the reciprocal of a number is equal to the quotient of 20 and the number. find the number.
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Find the rate of change for the situation.you run 7 miles in one hour and 21 miles in three hours.
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