You earn $3 an hour as a waitress. after working 3 hours, you earn $12, $5, and $7 in tips. how much money did you earn in total? explain how you found your answer. whats the hidden question in this?

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.

An arc subtends a central angle measuring 7pi/4 radians what fraction of the circumference is this arc?

The figure shows the front side of a metal desk in the shape of a trapezoid. what is the area of this trapezoid? 10 ft²16 ft²32 ft²61 ft²