Who did more sit ups per minute? Zach (sit ups= 96) (minutes= 3) Blake (sit ups= 180) (minutes= 4)

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Choose the more precise measurement. 26.4 cm or 8.39 cm

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?