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Reil [10]
3 years ago
8

What is the length of the diagonal of a 10cm by 15com rectangle

Mathematics
1 answer:
AlekseyPX3 years ago
8 0

a2 + b2 = c2


102 + 152 = c2


100 + 225 = c2


√325 = c


5√13 = c


The diagonal measures 5<span>√13</span><span> cm.</span>

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In a recent study of 42 eighth graders, the mean number of hours per week that they watched television was 19.6. Assume the popu
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Answer:

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19.6+2.42\frac{5.8}{\sqrt{42}}=21.77    

And the best option for this case would be:

a. (17.5, 21.7)

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Information given

\bar X= 19.6 represent the sample mean

\mu population mean

\sigma= 5.8 represent the population deviation

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Confidence interval

The confidence interval for the mean is given by the following formula:

\bar X \pm t_{\alpha/2}\frac{s}{\sqrt{n}}   (1)

The degrees of freedom, given by:

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19.6-2.42\frac{5.8}{\sqrt{42}}=17.43    

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And the best option for this case would be:

a. (17.5, 21.7)

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