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shtirl [24]
3 years ago
9

Work out the circumference of a circle with radius 6.5cm

Mathematics
1 answer:
denis-greek [22]3 years ago
7 0

Answer:

circumference=13π cm (see below if you need π approximated)

Step-by-step explanation:

Hi there!

The formula for the circumference of a circle is given as 2πr, where r is the radius and π is pi

we are given that the radius of the circle is 6.5 cm

substitute what we know into the equation:

circumference=2πr

circumference=2π*6.5

circumference=13π cm

some places will accept the answer as 13π, but others ask to have π substituted, usually as 3.14 or 22/7

if you need π substituted as 3.14, the answer will be 40.82 cm

if you need π substituted as 22/7, the answer will be about 40.86 cm

Hope this helps! :)

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Veronika [31]

The simplified expression of 6(y + 13) + 21y is 27y + 78

<h3>How to simplify the expression?</h3>

The expression is given as:

6(y + 13) + 21y

Open the brackets

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Evaluate the product

6y + 78 + 21y

Collect the like terms

6y + 21y + 78

Evaluate the like terms

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Hence, the simplified expression of 6(y + 13) + 21y is 27y + 78

Read more about simplified expressions at

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2 years ago
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Answer:

109.9 feet

Step-by-step explanation:

To find how many feet has Miguel traveled, we need to know the circunference of the tire:

C = pi*d = 3.14 * 28 = 87.92 inches

So, for each revolution of the tire, Miguel will travel 87.92 inches. So, to know the distance he will travel, we can do a rule of three:

1 revolution -> 87.92 inches

15 revolutions -> x inches

1/15 = 87.92/x

x = 87.92 * 15 = 1318.8 inches

As the question asks for the distance in feet, we convert from inch to foot by dividing the value of inches by 12, so:

distance in feet = 1318.8 / 12 = 109.9 feet

4 0
4 years ago
Solve pls brainliest
iogann1982 [59]

Step-by-step explanation:

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5 0
3 years ago
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Answer:

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Step-by-step explanation:

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3 years ago
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