One month, ruby worked 8 hours more than isaac, and svetlana worked 4 times as many hours as ruby. together they worked 148 hours. find the number of hours each person worked.

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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.

Do 12/14 and 8/10 have the same value? explain your answer.

The ph level of a blueberry is 3.1 what is the hydrogen-ion concentration [h+] for the blueberry