Lin runs 5 laps around the track in 10 minutes If Lin runs 21 laps at the same rate, how long does it take her?

In the figure shown below, m < 40 and ab =8. which equation could be used to find x?

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.

An airplane travels at an unknown elevation before it descends 3 miles to an elevation of 15 miles. find the elevation of the plane before its descen.