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earnstyle [38]
3 years ago
12

What is the approximate area of the shaded sector in the circle shown below

Mathematics
1 answer:
jeyben [28]3 years ago
6 0

Answer: B

Step-by-step explanation:

The area of a circle is pi*radius^2. But only a diameter is given, so in order to find the radius, you must divide the diameter by 2:

3.6/2 = 1.8

Now, you can plug the radius, 1.8, into the equation pi*radius^2 (\pi r^{2}):

\pi (1.8)^2 = \pi(3.24) = about 10.18

Lastly, you must divide the area 10.18 by 2 because you are looking for only half the area.

10.18/2 = 5.09

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The larger of two numbers is five more than twice the smaller number. The sum of the two numbers is 38. Find the numbers.
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Answer:

I would set this up as:

let: lesser number = x

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Restating the word problem:

lesser number + greater number = 38

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                  - 5     -5

             ---------------

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              ---          ---

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Substitution for the greater number:

        2(11) + 5

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