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AlekseyPX
3 years ago
14

The formula for the circumference of a circle is c=πr, where r is the radius and C is the circumference. The equation solved for

r is r=c/2π
Find the radius of a circle that has a circumference of 16π
A)r=4
B)r=8
C)r=12
D)r=16
Mathematics
1 answer:
dem82 [27]3 years ago
4 0

Answer:

The answer is B

Step-by-step explanation:

r = c/2π

c = 16π

r = 16π/2π

= 8

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Hey there!

In order to solve this problem, we can use the Pythagorean Theorem, which is c^2 = a^2 + b^2. Since the Pythagorean Theorem would find only half of the length of x, we'll need to double it in the end.

First, let's plug in what we know to the Pythagorean Theorem: 2.1^2 = 1.4^2 + b^2

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How to round to the nearest tenth:

In a decimal, the tenth is the first number after the decimal point. To round to the tenth, if the number in the hundredth place is less than 5, you keep the number as it is, but if the number in the hundredth place is more than 5, you increase the number in the tenth place by 1.


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