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3 years ago

Help!!! it's a circumference problem!

Mathematics

2 answers:

Phoenix [80]3 years ago

4 0

Answer: 69.12

Step-by-step explanation: circumference=2*pi*radius

Makovka662 [10]3 years ago

4 0

Answer:

The circumference of the circle is 69.12 m

Step-by-step explanation:

Circumference of a Circle

Given a circle of radius r, the circumference or perimeter of the circle is calculated by the formula:

$C=2\pi\ r$

The circle shown in the image has a radius of r=11 m, thus the circumference is:

$C=2\pi\ *11$

$C=22\pi$

Calculating:

C = 69.12 m

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3 years ago

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3 years ago

Aiden wrote a riddle: Five less than 1/5 times a number is the same as the sume of the number and 1/3. Find the number.

Brrunno [24]

The number is -6.67

Solution:

Let "n" be the number

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$\text{ Five less than 1/5 times a number } = \frac{1}{5}n - 5 = \frac{5}{n} - 5$

$\text{Sum of number and 1/3 } = n + \frac{1}{3} =\frac{3n+1}{3}$

Given that,

Five less than 1/5 times a number is the same as the sum of the number and 1/3

Therefore, we get,

$\frac{n}{5} - 5 = n + \frac{1}{3}\\\\Simplify\ the\ expression\\\\n - 25 = 5(n + \frac{1}{3})\\\\n - 25 = 5n + \frac{5}{3}\\\\n - 25 = \frac{15n + 5}{3}\\\\3n - 75 = 15n + 5\\\\12n = -80\\\\n = -6.67$

Thus the number is -6.67

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4 years ago

Help!!! it's a circumference problem! ​

Help!!! it's a circumference problem!