How to graph and find the points of quadratics graphs HELP !!! :)

Mr. thompson is on a diet. he currently weighs 260 pounds. he loses 4 pounds per month. what part of the story makes the relationship not proportional?

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

Find the area of the region that is inside r=3cos(theta) and outside r=2-cos(theta). sketch the curves.