I need help ASAP first person will get a crown

In a school 2/3 of the students study a language of those who study a language 2/5 study french

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters

The circle below is centered at the point (3, 1) and has a radius of length 2. what is the equation?