A round swimming pool has a circumference of 66 feet. Carlos wants to buy a rope to put across the diameter of the pool. the rope costs $0.45 per foot, and Carlos needs 4 more than the diameter of the pool. How much will Carlos pay for the rope and what is the diameter?
+36915 Circle circumference = pi * d
diameter then equals circ/pi = 66/pi = 21 ft + 4ft extra = 25 feet
25 feet x .45 $/ft = $ 11.25
