Recall Carol's plans to plant 4 tree seedlings in the yard. She wants to buy bark mulch to place in a circle with a 48-inch diameter around the base of each tree. She has been told to lay the mulch 3 inches deep. The mulch is sold in bags containing 2 cubic feet, for $4.49. Calculate the charge for the mulch, including 7.5 % sales tax. What is the total charge Carol will have to pay mplete her ulch project? to