After running a marathon, marcel’s heart beat rate was 80 beats in twenty seconds. what was his heart rate for 1 second?

Charles is on a 8 1/2 mile bike ride. he stops for a rest after he’s gone 5 2/5 miles. how much farther does he still have to go?

Acertain volume of water contains 100000 hydrogen atoms and 50,000 oxygen atoms how many hydrogen atoms are in a volume of water containing 4 million oxygen atoms

What function has a range {yly< 5}? question on picture above^