Who ever gets it first will get a brainlest

Money off coupons have been circulated to 300 households. only 2/5 of these were redeemed (used) in the local supermarket to get a free shampoo. what fraction of coupons were unused? (ps: write how you got the answer)

Shannon drove for 540 minutes. if she traveled 65 miles per hour,how many total miles did she travel?

In the diagram, ab is tangent to c, ab = 4 inches, and ad = 2 inches. find the radius of the circle.