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grin007 [14]
3 years ago
8

What is a perfect circle

Mathematics
2 answers:
Anon25 [30]3 years ago
6 0

Answer:

A circle which has the exact same radius no matter what direction you measure in

Step-by-step explanation:

Probably

Usimov [2.4K]3 years ago
3 0

It is a 2D shape. it is not a sphere because spheres are 3D. It also has the same width, length and hieght all the way around.

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Which of these is the algebraic expression for "4 less than the product of 3 and some number?"
dolphi86 [110]

Answer:

Step-by-step explanation:

3m - 4 is the answer

hope this helps

plz mark it as brainliest!!!!!!!!!!!

3 0
2 years ago
Find the 12th term of the geometric sequence 1, 2,4
irakobra [83]

Answer:

The 12th term in the sequence is 22

5 0
3 years ago
Read 2 more answers
Assume that the empirical rule is a good model for the time it takes for all passengers to board an airplane. The mean time is 4
slamgirl [31]

Answer:

The interval that describes how long it takes for passengers to board the middle 95% of the time is between 40.16 minutes and 55.84 minutes.

Step-by-step explanation:

Problems of normally distributed samples can be 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 = 48, \sigma = 4.

Which interval describes how long it takes for passengers to board the middle 95% of the time?

This is between the 2.5th percentile and the 97.5th percentile.

So this interval is the value of X when Z has a a pvalue of 0.025 and the value of X when Z has a pvalue of 0.975

Lower Limit

Z has a pvalue of 0.025 when Z = -1.96. So

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

-1.96 = \frac{X - 48}{4}

X - 48 = -1.96*4

X = 40.16

Upper Limit

Z has a pvalue of 0.975 when Z = 1.96. So

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

1.96 = \frac{X - 48}{4}

X - 48 = 1.96*4

X = 55.84

The interval that describes how long it takes for passengers to board the middle 95% of the time is between 40.16 minutes and 55.84 minutes.

7 0
3 years ago
Find a point-slope form for the line with slope 1/5 and passing through the point (- 4. - 8).
andrew11 [14]

Answer:

y+8 = 1/5(x+4)

Step-by-step explanation:

The point slope form of a line is

y-y1 = m(x-x1) where m is the slope and (x1,y1) is a point on the line

y- -8 = 1/5(x - -4)

y+8 = 1/5(x+4)

4 0
2 years ago
What is 4 divided by 2.28
jek_recluse [69]
1.75 or 7/4 as a fraction
5 0
3 years ago
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