Simplify
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Easy 30 points

The physical fitness of an athlete is often measured by how much oxygen the athlete takes in (which is recorded in milliliters per kilogram, ml/kg). the mean maximum oxygen uptake for elite athletes has been found to be 60 with a standard deviation of 7.2. assume that the distribution is approximately normal.

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Olga bought a new skirt that cost $20. sales tax is 5%. how much did olga pay, including sales tax? 7.