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rjkz [21]
3 years ago
12

the area of a circle is 81 pi m^2. what is the circumference, in meters? express your answer in terms of pi.

Mathematics
1 answer:
mestny [16]3 years ago
8 0
<h3>Answer:    18pi</h3>

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

Explanation:

The area 81pi square meters leads to the radius 9 meters

Use the formula A = pi*r^2 to see why this is the case. You plug in A = 81pi and solve for r to get r = 9.

-----------------

Once you know the radius, you can determine the circumference C

C = 2*pi*r

C = 2*pi*9

C = 2*9*pi

C = 18pi

The circumference is the perimeter, or distance, around the circle.

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5 0
2 years ago
Dr. Jon planned to reward his class with candy because everyone got a A on the test. He surveyed every 4th student that entered
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This is an example of a systematic sample.

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8 0
3 years ago
PLS I NEED HELP I GIVE ALL POINTS I HAVE!! :( In 1984 the average American ate 55.7 pounds of chicken. This was 2.8 pounds more
olya-2409 [2.1K]

Answer: Production in 2007 reached more than. 91.5 billion pounds. ... billion pounds, with chicken production totaling 36.6 ... Average Annual Per Capita Consumption (in pounds). 0.0. 10.0 ... 1980 1982 1984 1986 1988 1990 1992 1994 1996 1998 2000 2002 2004 2006. Year ... half (55 percent) of all meat consumed are red meat.

simplfying to get 19.8928571429

then you mul·ti·ple equals 155.96

then you subtract and it gets you 52.9

then you add gets you 58.5.

This question is quite simple as long as you know how to do math you should ace all of your math classes..

Mathematics can get pretty complicated. Fortunately, not all math problems need to be inscrutable. Here are five current problems in the field of mathematics that anyone can understand, but nobody has been able to solve.

like...Pick any number. If that number is even, divide it by 2. If it's odd, multiply it by 3 and add 1. Now repeat the process with your new number. If you keep going, you'll eventually end up at 1. Every time.

Mathematicians have tried millions of numbers and they've never found a single one that didn't end up at 1 eventually. The thing is, they've never been able to prove that there isn't a special number out there that never leads to 1. It's possible that there's some really big number that goes to infinity instead, or maybe a number that gets stuck in a loop and never reaches 1. But no one has ever been able to prove that for certain.

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This is the essence of the moving sofa problem. Here are the specifics: the whole problem is in two dimensions, the corner is a 90-degree angle, and the width of the corridor is 1. What is the largest two-dimensional area that can fit around the corner?

The largest area that can fit around a corner is called—I kid you not—the sofa constant. Nobody knows for sure how big it is, but we have some pretty big sofas that do work, so we know it has to be at least as big as them. We also have some sofas that don't work, so it has to be smaller than those. All together, we know the sofa constant has to be between 2.2195 and 2.8284.

AM I BEING TO MUCH OF A SMART ALECK, I'm sorry if i am LOL.

but if you need help with another question, you can ask me :)

4 0
3 years ago
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andrezito [222]

Answer: 30.5

Step-by-step explanation:

3 0
2 years ago
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deff fn [24]
I think  that the answer should be around 2.55

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