All categories

3 years ago

The circumference of a circle is 6 pi cm. What is the area of circle

Mathematics

2 answers:

AURORKA [14]3 years ago

6 0

Answer:

A = 9 pi cm^2

Step-by-step explanation:

Circumference = 2 * pi *r

6pi = 2 * pi *r

Divide each side by pi

6 = 2r

Divide by 2

6/2 = 2r/2

3=r

Now we want to find the area

A = pi r^2

A = pi (3)^2

A = 9 pi cm^2

kati45 [8]3 years ago

6 0

Answer: $28.27cm^2$

Step-by-step explanation:

The area of a circle can be calculated with the formula:

$A=\pi r^2$

Where r is the radius of the circle.

The circumference of a circle can be calculated with the formula:

$C=2\pi r$

Where r is the radius of the circle.

Knowing that the circumference is 6π, you know that the radius is:

$r=\frac{6\pi}{2\pi}\\r=3cm$

Substitute the radius of the circle into the formula $A=\pi r^2$ , then:

$A=\pi (3cm)^2\\A=28.27cm^2$

You might be interested in

Which of the following describes the sum in terms of p and q?(1 point)

snow_tiger [21]

The description of the summation expression given as p + (-q) is the sum, p + (-q), is the number located a distance, |p|, from , q, in the negative direction.

<h3>How to describe the sum in terms of p and q?</h3>

The summation expression is given as:

p + (-q)

In the above summation expression, we assume that:

p ⇒ Positive number

- q ⇒ Negative number

Having said that:

The expression -q would go in the negative direction if plotted on a number line

This means that the description of the summation expression given as p + (-q) is the sum, p + (-q), is the number located a distance, |p|, from , q, in the negative direction.

Hence, the description of the summation expression given as p + (-q) is the sum, p + (-q), is the number located a distance, |p|, from , q, in the negative direction.

Read more about expressions at:

brainly.com/question/723406

#SPJ1

6 0

2 years ago

What is the quotient of (2x3 – 29x + 13) ÷ (x + 4)?

sleet_krkn [62]

9514 1404 393

Answer:

C. 2x^2 -8x +3 +1/(x +4)

Step-by-step explanation:

Synthetic division is useful for finding the quotient. Or, you can use polynomial long division. The result is the same, but synthetic division requires less writing.

7 0

3 years ago

A Florida neighborhood is comprised of a total of 250 houses of which 12% are in foreclosure. A random sample of 91 homes from t

natka813 [3]

Answer:

the standard error of the proportion is 0.0272

Step-by-step explanation:

We have that if the sample size is greater than 5% of the entire population, a finite population correction factor (fpc) is multiplied with the standard error :

fpc = $\sqrt{\frac{N -n}{N -1} }$

We know that N = 250 n = 91, replacing:

fpc = $\sqrt{\frac{250 - 91}{250 -1} }$

fpc = 0.799

Now, the formula would then be:

SE = $\sqrt{\frac{p * (1 -p)}{n} }$ *fpc

Now replacing, knowing that p = 0.12

SE= $\sqrt{\frac{0.12 * (1 - 0.12)}{91} }$ *0.799

SE = 0.0272

So the standard error of the proportion is 0.0272

6 0

3 years ago

X is at most 30 represent as an algebraic inequality

masya89 [10]

Answer:

x ≤ 30

Step-by-step explanation:

'at most' means the same as 'less than or equal to'.

The sign 'for less than or equal' to is ≤.

So it's simply x ≤ 30.

6 0

3 years ago

Define perpendicular bisector

tresset_1 [31]

Answer:

Step-by-step explanation:

A perpendicular bisector is a special kind of segment, ray, or line that. (1) intersects a given segment at a 90° angle, and. (2) passes through the given segment's midpoint. Segment CD is the perpendicular bisector to segment AB. We derive two important theorems from the characteristics of perpendicular bisectors.

7 0

4 years ago

Read 2 more answers