What number do I call for 911 again?

Mathematics

2 answers:

sesenic [268]3 years ago

7 0

Answer:

you call 911

Step-by-step explanation:

i hope you are doing ok

tiny-mole [99]3 years ago

4 0

Answer:

9-1-1 I am pretty sure 0///0

Step-by-step explanation:

am I wrong I-

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For which distributions is the median the best measure of center? Select each correct answer. Y 20 30 18 25 16 20 14 15+ 12 10+

AURORKA [14]

Answer:

The median is the best measure of center for distributions C and D.

Step-by-step explanation:

The median is the best measure of center for skewed distributions or distributions with outliers because it is a robust statistic, meaning that outliers and skewed data have little effect on the median.

Meanwhile, the mean is a good measure of center for symmetric distributions since it is non-robust.

Answer A has a roughly symmetric distribution, and answer B has a uniform distribution.

Answer C has a left-skewed distribution, and answer D seems to have a right-skewed distribution (since the right tail is longer than the left tail).

Therefore, the median would be the best measure of center for choices C and D.

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Find a formula for cos(tan−1(2x)) in terms of x

aleksklad [387]

$~\cos\left( \tan^{-1} 2x\right)\\\\\\=\cos \left[\cos^{-1} \dfrac{1}{\sqrt{(2x)^2+1^2}} \right]~~~~~~~~~~~~~~~~~~~~~~~~~~;[\text{Pythagorean theorem}]\\\\\\=\cos \left( \cos^{-1} \dfrac{1}{\sqrt{4x^2 +1}} \right)\\\\\\=\dfrac{1}{\sqrt{4x^2 +1}}$