Brittany is making hair bows to sell at a craft show. each hair bow requires 3/4 yard of ribbon. brittany plans to make 50 bows. how many yards of ribbon does brittany need to purchase?

Ineed to learn how to solve this problem

Avery’s piggy bank has 300 nickels, 450 pennies, and 150 dimes. she randomly picks three coins. each time she picks a coin, she makes a note of it and puts it back into the piggy bank before picking the next coin.

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