9514 1404 393
Answer:
- 17.27 miles around
- about 23.75 square miles
Step-by-step explanation:
a) The circumference of the circle is given by ...
C = πd
C = (3.14)(5.5 mi) = 17.27 mi
The distance around the lake is about 17.27 miles.
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b) The area is given by ...
A = πr^2 . . . . . where r = d/2
A = (3.14)(2.75^2) ≈ 23.75 . . . . square miles
The surface area of the lake is about 23.75 square miles.
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If you use a more exact value of pi (the "pi button" for example), then the hundredths digit increases by 1 in each case: 17.28, 23.76.
