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yarga [219]
3 years ago
11

Name one way the circumference and area of a circle are the same and one way they are different

Mathematics
2 answers:
slega [8]3 years ago
6 0
Pertaining to the actual formula...

The circumference and area of a circle both need the radius (or diameter, one to find the other) and pi to be solved.

However, the area of a circle squares the radius while the circumference doubles it. They then both multiply pi. 

Pertaining to the actual definition...
Both the circumference and area measure a part of the circle.

However, the circumference measures the distance <em>around</em> the circle while the area measured the space <em>inside </em>the circle.

Hope this helps!
wel3 years ago
3 0
SAME: Both measure a circle

DIFFERENT: Circumference measures AROUND the circle and the area measures the entire circle.



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C.169

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A radioactive isotope has a rate of decay of 84%. that is, every day,
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The half life of the radioactive isotope to the nearest tenth is  0.83 days.

<h3>What is rate of radioactive decay?</h3>

The rate of radioactive decay is the rate at which a radioactive isotope is disintegrated. The half life is the time taken for half of the original amount of radioactive isotope to remain.

Given that;

t/12 = 0.693/k

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t/12 = 0.693/0.84

t/12 = 0.83 days

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While walking between gates at an airport, you notice a child running along a moving walkway. Estimating that the child runs at
tekilochka [14]

The speed of the moving walkway relative to the airport terminal exists at 1.84 m/s.

<h3>How to estimate the speed of the moving walkway relative to the airport terminal?</h3>

Let x be the speed of the walkway.

(2.8 + x) = speed of child moving in direction of the walkway

(2.8 - x) =  speed of child moving against the direction of the walkway

Travel time = distance/speed

Travel time of child moving in direction of walkway = 23/(2.8+x)

Total elapsed time given = 29s

23/(2.8 + x)+ 23 / (2.8-x) = 29

LCD = (2.8 + x)(2.8 - x)

23(2.8 - x) + 23(2.8 + x) = 29(2.8 + x)(2.8 -x)

simplifying the equation, we get

23*2.8-23x+23*2.8+23x=29(2.8^2-x^2)

23(2.8+2.8)/29=2.8^2-x^2

x^2=(2.8)^2-(23*5.6)/29)=3.4

x=\sqrt{3.4}=1.84m/s

Speed of walkway = 1.84 m/s

The speed of the moving walkway relative to the airport terminal exists at 1.84 m/s.

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