At the moment a certain medicine is injected, it’s concentration in the bloodstream is 120 milligrams per liter. From that moment forward, the medicine’s concentration drops 30% each hour. Write a function that gives the medicine’s concentration in milligrams per liter, c(t),t hours after the medicine was injected.

Hello can you me find all the products

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.