4 years ago

What is the square root of 250

Mathematics

1 answer:

Naddika [18.5K]4 years ago

7 0

$\sqrt{250} =5 \sqrt{10}$

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Wewaii [24]

Answer: 95% of all people work between 7 hours and 9 hours per day and It is true.

Step-by-step explanation:

Since we have given that

Mean = 8 hours

Standard deviation = 0.5 hours

According to Empirical Rule,

at 95% confidence, it lies within 2 standard deviations from the mean

so, lower value is given by

$mean-2\times sd\\\\=8-2\times 0.5\\\\\=8-1\\\\=7\ hours$

upper value is given by

$mean+2\times s.d\\\\=8+2\times 0.5\\\\=8+1\\\\=9\ hours$

Hence, 95% of all people work between 7 hours and 9 hours per day.

Therefore , it is true.

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Out of a class of 150 students, two-fifths opted for German classes and one-third opted for Italian classes. The remaining opted

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Fraction of students that opted for French = $\frac{4}{15}$

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Fraction of students that opted for German = $\frac{2}{5}$

Fraction of students that opted for Italian = $\frac{1}{3}$

Fraction of students that opted for French = 1 - Fraction of students that opted for German - Fraction of students that opted for Italian

Fraction of students that opted for French = $1-\frac{2}{5} - \frac{1}{3}$

Fraction of students that opted for French = $\frac{15-6-5}{15}$

Fraction of students that opted for French = $\frac{4}{15}$

Learn more here: brainly.com/question/18819021

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Step-by-step explanation:

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