What’s the radius of d= 36 ft

What situation is an example of an observational study

Jackie purchased 3 bottles of water and 2 cups of coffee for a family for $7.35. brian bought 4 bottles of water and 1 cup of coffee for his family for $7.15. how much does each bottle of water cost? how much does each cup of coffee cost? i need this done

Atriangle with all sides of equal length is a/an triangle. a. right b. scalene c. equilateral d. isosceles