NEED HELP ASAP 100 POINTS (Free points)

1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 x 10 x 11 x 12 x 13 x 14 x 15 x 16 x 17 x 18 x 19 x 20 x 0

Molly shared a spool of ribbon with 12 people. each person received 3 feet of ribbon. which equation can she use to find r, the number of feet of ribbon that her spool originally had?

F(x)=5/6x+3 which of the following is true

The area of a circle is equal to 1 dm². find the radius of the circle.