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AnnyKZ [126]
3 years ago
12

The area of the circle is 64pie cm. What is the radius in cm?

Mathematics
2 answers:
Vinil7 [7]3 years ago
8 0

Answer: 8 centimeters

Step-by-step explanation: To find the radius of the circle, remember that the formula for the area of a circle is πr² and since we're given that the area of our circle is 64π, we can set up the equation 64π = πr².

To solve for <em>r</em>, we first divide both sides of the equation by π.

On the left side, the π's cancel and we're left with 64 and on the right side, the π's cancel and we're left with r².

So we have 64 = r².

Next, we take the square root of both sides to get 8 = r.

So the radius of our circle is 8 centimeters.

ozzi3 years ago
7 0
Your answer should be 8 cm.
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I REALLY NEED HELP ASAP!!!
kkurt [141]

m<P would be:

25

but m<PQC I forgot how to do... sorry!

8 0
3 years ago
What is 45,231 written in expanded form? 2 x 10,000 + 1 x 1,000 + 3 x 100 + 5 x 10 + 4 2 x 10,000 + 3 x 1,000 + 1 x 100 + 4 x 10
adoni [48]

Answer:

45231 = 4 \times 10000 + 5\times 1000 +2 \times 100 + 3\times 10 +1 \times 1

Step-by-step explanation:

Given the number:

45,231

We have To write the given number in the expanded form.

Solution:

First of all, let us write the different digits of the number:

Unit's digit = 1

Ten's digit = 3

Hundred's digit = 2

Thousand's digit = 5

Ten thousand's digit = 4

Unit's digit has to be multiplied with 1.

Ten's digit has to be multiplied with 10.

Hundred's digit has to be multiplied with 100.

Thousand's digit has to be multiplied with 1000.

Ten Thousand's digit has to be multiplied with 10000.

And then they have to be added so that the number gets formed.

45231 = 4 \times 10000 + 5\times 1000 +2 \times 100 + 3\times 10 +1 \times 1

3 0
3 years ago
Today only, a desk is being sold at a 29% discount. The sale price is $213.
blondinia [14]

Answer:

$274.77

Step-by-step explanation:

213.00 ÷29 =61.769999 then add 213.00 plus 61.76

I actually rounded up maybe I shouldn't of then answer would be $274.76. im not postive this is correct .

4 0
2 years ago
Suppose the number of insect fragments in a chocolate bar follows a Poisson process with the expected number of fragments in a 2
leonid [27]

Answer:

a)The expected number of insect fragments in 1/4 of a 200-gram chocolate bar is 2.55

b)0.6004

c)19.607

Step-by-step explanation:

Let X denotes the number of fragments in 200 gm chocolate bar with expected number of fragments 10.2

X ~ Poisson(A) where \lambda = \frac{10.2}{200} = 0.051

a)We are supposed to find the expected number of insect fragments in 1/4 of a 200-gram chocolate bar

\frac{1}{4} \times 200 = 50

50 grams of bar contains expected fragments = \lambda x = 0.051 \times 50=2.55

So, the expected number of insect fragments in 1/4 of a 200-gram chocolate bar is 2.55

b) Now we are supposed to find the probability that you have to eat more than 10 grams of chocolate bar before ending your first fragment

Let X denotes the number of grams to be eaten before another fragment is detected.

P(X>10)= e^{-\lambda \times x}= e^{-0.051 \times 10}= e^{-0.51}=0.6004

c)The expected number of grams to be eaten before encountering the first fragments :

E(X)=\frac{1}{\lambda}=\frac{1}{0.051}=19.607 grams

7 0
3 years ago
1. What number decreased by 9 is 25? (0.5 pt)
Blizzard [7]

Answer:

34

Step-by-step explanation:

x - 9 = 25

x=25+9

x=34

4 0
3 years ago
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