Luke uses rug hooking to make a new rug. He estimates that the cost of the yarn will be $5 per foot. How much will he spend on yarn? . The diameter of the rug is 4.5 feet. What is the radius? What is the area of the rug? A=IIr feet A = ( A=( X X Area is square feet How much will the yarn cost? total cost = (price)(amount) X . Cost = ($ . Cost = $