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2 years ago

What is the volume ?

Mathematics

2 answers:

mylen [45]2 years ago

5 0

Answer:

523.67km^3

Step-by-step explanation:

$volume \: of \: a \: sphere = \frac{4}{3} \: \pi \: r {}^{3} \\ radiu \: r = \frac{10}{2} = 5km \\ volume = \frac{4}{3} \times 3.142 \times 5 {}^{3} \\ volume = \frac{1571}{3} = 523.67km {}^{3}$

dybincka [34]2 years ago

4 0

Answer:

V≈523.6

Step-by-step explanation:

Volume is V=4/3*pi*r^3 and radius is half of diameter

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1/6 thats it u cant simplify

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3 years ago

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Answer:

$(21.9-19.8) -1.966\sqrt{\frac{3.4^2}{200} +\frac{3.5^2}{200}}= 1.422$

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And we are 95% confident that the true difference means are between $1.422 \leq \mu_1 -\mu_2 \leq 2.778$

Step-by-step explanation:

We know the following info:

$\bar X_1 = 21.9$ sample mean for group 1

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$s_2 = 3.5$ sample standard deviation for group 2

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We want to find a confidence interval for the difference of means and the correct formula to do this is:

$(\bar X_1 -\bar X_2) \pm t_{\alpha/2} \sqrt{\frac{s^2_1}{n_1} +\frac{s^2_2}{n_2}}$

Now we just need to find the critical value. The confidence level is 0.95 then the significance is $1-0.95 =0.05$ and $\alpha/2 =0.025$ . The degrees of freedom are given by:

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tensa zangetsu [6.8K]

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a_sh-v [17]

Step-by-step explanation:

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