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elena-s [515]
3 years ago
11

I need to find the area, what is it?

Mathematics
2 answers:
erica [24]3 years ago
4 0

a = πr²

1.8 /2 = 0.9

0.9² = 0.81

0.81 * π = 2.54(roughly)

tatuchka [14]3 years ago
3 0
2.54 used a calculator, I suggest using a calculator with pie available to be used with it
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A person is watching a boat from the top of a lighthouse. The boat is approaching the lighthouse directly. When first noticed, t
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Answer:

509.35 feet

Step-by-step explanation:

16°23' means 16 degrees and 23 minutes.  A minute is 1/60 of a degree.

16°23' = 16 + (23/60) = 16.383°

Similarly:

49°29' = 49 + (29/60) = 49.483°

When the boat is first noticed:

tan(16.383°) = 200 / a

a = 200 / tan(16.383°)

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When the boat stops:

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b = 170.92

So the difference is:

a − b = 680.27 − 170.92 = 509.35

The boat traveled 509.35 feet from the time it was first noticed to the time it stopped.

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3 years ago
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3 years ago
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