If the measurement of angle GEF is 5x-13, the measurement of angle DEG is x, and the measurement of angle DEF is 149 degrees, find the measurement of angle GEF.

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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Is the square root of 4 plus the square root of 16 rational?