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bearhunter [10]
3 years ago
8

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 rop

e 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? (please show work on paper)
Mathematics
1 answer:
xxMikexx [17]3 years ago
3 0

Answer:

  • $11.25
  • 21 ft

Step-by-step explanation:

The formula for the circumference of a circle in terms of diameter is ...

  C = πd

Then the diameter is ...

  d = C/π

If we use π ≈ 22/7 and C = 66 ft, then we find the diameter to be ...

  d = (66 ft)/(22/7) = (66 ft)(7/22) = 21 ft

The diameter of the pool is about 21 feet.

__

Since Carlos needs 4 more feet of rope, he will want to buy 25 feet of rope for a cost of ...

  (25 ft)($0.45 /ft) = $11.25

Carlos will pay $11.25 for the rope.

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