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taurus [48]
3 years ago
7

Find the circumference of a circle with an area of 28.26. Show work please.

Mathematics
1 answer:
muminat3 years ago
4 0

Answer:

18.84

Step-by-step explanation:

Since the formula for circumference is C=2\pi r, we need to first find the radius. The formula for the radius is r=\frac{\sqrt{A\pi } }{\pi }, so we will get r=3. Substitute that into C=2\pi r, and we get C=18.84. Hope this helps!

<h2><u><em>Please mark brainliest!</em></u></h2>
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Fofino [41]

9514 1404 393

Answer:

  1.1.1  sin(241°) = -√t

  1.1.2  cos(61°) = √(1 -t)

Step-by-step explanation:

<u>Given</u>:

 sin(61°) = √t

<u>Find</u>:

  1.1.1  sin(241°)

  1.1.2  cos(61°)

<u>Solution</u>:

1.1.1  sin(180° +x) = -sin(x)

  sin(241°) = -sin(61°) = -√t

__

1.1.2  cos(x) = √(1-sin²(x))

  cos(61°) = √(1 -(√t)²) = √(1 -t)

4 0
2 years ago
In triangle ABC, the length of side AB is 19 inches and the length of side BC is 28 inches. Which of the following could be the
DENIUS [597]
<h3>Answer:  C) 42 inches</h3>

=========================================================

Explanation:

Let's say we have a triangle with sides x,y,z

Also, let's further say we know that x = 19 and y = 28 (from AB and BC respectively).

The third missing side z can't be nailed down to a single number, but we can establish a possible range. That range is

y-x < z < y+x

28-19 < z < 28+19

9 < z < 47

So any number between 9 and 47, excluding both endpoints, will work as a possible side length for the third missing side.

Something like 7 inches is too small, so we rule out choice B. Choice D is ruled out since 49 inches is too big. Same goes for choice A also.

The only thing left is choice C. The 42 is between 9 and 47

In other words, 9 < 42 < 47 is true.

So that's why the third missing side could be 42 inches.

Side note: I'm using a modification of the triangle inequality theorem.

8 0
3 years ago
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mr Goodwill [35]

Answer:yes

Step-by-step explanation:

5 0
3 years ago
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HELPPPP......ASAP Will give 10 points
Leni [432]

Answer:

120 degrees, I think

Step-by-step explanation:

5 0
3 years ago
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in the northen hemisphere the ratio of tye area of the water is 2:3 work out the percentage of tge area of the northen hemispher
labwork [276]

Answer:

40%

Step-by-step explanation:

l2:w3 means that the fraction of land is 2/5.

time 2/5 by 20, you get 40/100

convert 40/100 into percentage is 40%

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2 years ago
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