a round lake has a circular shoreline that is 16 miles in diameter find the are of the lake give your answer to the nearest hundredth

Question

owlfred · Answer

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anonymous · Answer

what do you know about the area of a circle of radius R?

anonymous · Answer

radius is half of the diameter

anonymous · Answer

right. so what is the radius in your problem?

anonymous · Answer

8

anonymous · Answer

right. so the radius is 8 miles.
what is the formula for area of a circle?

anonymous · Answer

A=PIE R SQUARE

anonymous · Answer

okay good.
so what is the area of the circular lake with radius 8 miles?

anonymous · Answer

201.06192

anonymous · Answer

22/7 x 8 x 8 = approx 200 mil squared

anonymous · Answer

$$A = \pi (8)^{2} = \pi \times 64 = 201.06193 sq.miles$$

anonymous · Answer

okay very good. now round it off to the nearest hundredth.

anonymous · Answer

200

anonymous · Answer

no no. what is one tenth?

anonymous · Answer

NO IDEA

anonymous · Answer

one-tenth is 0.1
similarly one-hundredth is 0.01.
so when some one says round it off to the nearest hundredth, they mean round it off to the nearest one hundredth.
so the nearest hundredth is 201.06 sq. miles