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3 years ago

If the circumference of a circle measures 12π cm, what is the area of the circle in terms of π?

1 answer:

5 0

So the formula for the circumference of a circle is π x diameter
Since we know the the circumference already, we just divide that by π:

12π / π = 12

Now we halve the diameter to get the radius:
12 / 2 = 6

The area of a circle is π x radius²
So the area is:

·π x 6² = 36π· (or 113 not in terms of π)

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What is the percent or change-----$84 to 12%

zubka84 [21]

$84 to 12%
10.08
is the answer

6 0

3 years ago

Suppose that birth weights are normally distributed with a mean of 3466 grams and a standard deviation of 546 grams. Babies weig

Anon25 [30]

Answer:

3.84% probability that it has a low birth weight

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean $\mu$ and standard deviation $\sigma$ , the zscore of a measure X is given by:

$Z = \frac{X - \mu}{\sigma}$

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

In this problem, we have that:

$\mu = 3466, \sigma = 546$

If we randomly select a baby, what is the probability that it has a low birth weight?

This is the pvalue of Z when X = 2500. So

$Z = \frac{X - \mu}{\sigma}$

$Z = \frac{2500 - 3466}{546}$

$Z = -1.77$

$Z = -1.77$ has a pvalue of 0.0384

3.84% probability that it has a low birth weight

3 0

3 years ago

Helpppppppppppppppppppppppppp

ddd [48]

Answer:
The last choice is the correct one

Explanation:
We can solve this question using "difference between squares" which has the following general rule:
a^2 - b^2 = (a+b)(a-b)

For the given question:
p^4 - 16 = (p^2 - 4)(p^2 + 4)

Now, p^2 - 4 can be further factorized using difference between squares, therefore:
p^4 - 16 = (p-2)(p+2)(p^2 + 4)

Hope this helps :)

5 0

3 years ago

Help!!!

oksano4ka [1.4K]

Answer:

Step-by-step explanation:

3.4 x -3.4= -11.56

3.4 X 3.4 = 11.56 YES

-3.4 X -3.4 = 11.56

-3.4 X 3.4 = -11.56

5 0

3 years ago

Read 2 more answers

(picture) Factoring Polynomials: GCF PLEASEE HELP!!!!! a b c d

kramer

For this case we must find the greatest common factor of both expressions, the GFC will be the greatest number that is a factor of both numbers, that is:

The number 4 is the greatest number that divides 32 and 12 resulting in a whole number.

$\frac {32} {4} = 8\\\frac {12} {4} = 3$

In addition, both expressions have as a common factor, $a ^ 2$ :

$4a ^ 2 (8a + 3)$

Thus, $32a ^ 3 + 12a ^ 2 = 4a ^ 2 (8a + 3)$

Answer:

$4a ^ 2 (8a + 3)$

Option A

3 0

3 years ago