A scuba diver started at sea level is descending at 4.2 ft every 1/3 of an hour. How far below sea level is he after 1 hour and 20 min??
4) Jayda is running around a track where 3 laps is 5 km. She runs 6 laps in 20 min. What is her speed in min per km??? PLZZ I will give you 100 pointd