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3 years ago

Please Solve x2 = 121

Mathematics

2 answers:

never [62]3 years ago

7 0

The answer to x2 is 11

Kisachek [45]3 years ago

4 0

Answer:

x = 60.5

Step-by-step explanation:

ok this simple you already have the variable and the number on different sides

x2 = 121

divide each side by 2

x2 / 2 = x

121 / 2 = 60.5

x = 60.5

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Answer:

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mrs_skeptik [129]

Answer:

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Anna11 [10]

Answer:

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Step-by-step explanation:

Given :

Number of weights of newborn girls n=185.

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Use a 95% confidence level i.e. cl=0.95

To find : What is the confidence interval for the population mean μ?

Solution :

Using t-distribution,

The degree of freedom $DF=n-1=185-1=184$

$\alpha=\frac{1-0.95}{2}$

$\alpha=0.025$

The t critical value is t=1.973.

The confidence interval build is

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$CI=31.4\pm(1.973\cdot \frac{7.5}{\sqrt{185}})$

$CI=31.4\pm(1.973\cdot 0.5514)$

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Therefore, the confidence interval for the population mean μ is $32.487$

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2 years ago