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Solnce55 [7]
3 years ago
14

find the circumference of a circle with a radius of 9, that's what it is asking, but I don't understand it, so can you help me?​

Mathematics
2 answers:
DanielleElmas [232]3 years ago
6 0

The formula for getting the circumference of a circle is C = 2\pi r where 'r' is the radius. Just plug in the value for the radius.

C = 2\pi * 9

We will also use 3.14 for PI.

C = 2 * 3.14 * 9

C = 56.52

Hope this helps!

Bess [88]3 years ago
6 0

Step-by-step explanation:

circumference of circle (c) = 2πr

= 2. 22/7 . 9cm

= 396cm/7

= 56.57cm

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General Formulas and Concepts:

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
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  • Exponential Rule [Rewrite]:                                                                              \displaystyle b^{-m} = \frac{1}{b^m}

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Derivative Notation

Basic Power Rule:

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Step-by-step explanation:

<u>Step 1: Define</u>

<u />\displaystyle y = \frac{3}{2x^2}<u />

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<u>Step 2: Differentiate</u>

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<u>Step 3: Solve</u>

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Topic: AP Calculus AB/BC (Calculus I/II)

Unit: Derivatives

Book: College Calculus 10e

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