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3 years ago

Find the circumference of a circle if the area is 300 sq centimeters

1 answer:

8 0

The circumference C=2 pi r and area A=pi r^2
A=300 cm^2
300=pi r^2 we divide by pi
300/3.14=r^2
r^2=95.55
r=sqrt 95.55
r=9.77
C=2*3.14*9.77=61.36

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4 years ago

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3 years ago

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GaryK [48]

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The next and every step are below.

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2. $-3 = - 2(x^2-x)$ : Given (commom factor - 2)

3. $-3-1/2=-2(x^2-x+1/4)$

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Since, the terms inside the parentthesis are multiplied by - 2, you have to add - 2 (1/4) = - 1/2 to the left side of the equation.

4. Now, you have that the trinomial x² - x + 1/4 is a square perfect trinomial which is factored as (x - 1/2)² and get the expression:

$-7/2=-2(x-1/2)^2$

5. Divide both sides by - 2 to get the next expression:

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6. The last step is to extract squere root from both sides of the equality:

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3 years ago

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Bond [772]

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Step-by-step explanation:

Plug in the standard deviation formula. This is new to me but it took some research.. Hope it helps

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3 years ago