Express 0,45 as a common fraction in simplest form

2 answers:

8 0

In order to express 0.45 as a common fraction, all you have to do is first divide 45 to 100. So in order to get the answer to this, you just have to put 45 as the numerator and 100 as the denominator. This will become 45/100. To turn it into its simple form, you have to first ask yourself what is a common divisible number for the two. 5 can be divided by 45 and 100 so 5 can be used. So the final answer, if you make it into simplest form, will be 9/20

Anna71 [15]3 years ago

7 0

If you would like to know what is 0.45 as a common fraction in its simplest form, you can calculate this using the following steps:

0.45 = 45/100

45/100 simplifies to 9/20 (the common factor of 45 and 100 is 5, so you can divide both numbers by 5).

The correct result would be 9/20.

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$7.38-1.96\frac{2.51}{\sqrt{601}}=7.18$

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For this case the confidence interval is given by :

$7.18 \leq \mu \leq 7.58$

Step-by-step explanation:

Data provided

$\bar X=7.38$ represent the sample mean for the fuel efficiencies

$\mu$ population mean

s=2.51 represent the sample standard deviation

n=601 represent the sample size

Confidence interval

The formula for the confidence interval of the true mean is given by:

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

The degrees of freedom for this case is given by:

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The Confidence level for this case is 0.95 or 95%, and the significance level $\alpha=0.05$ and $\alpha/2 =0.025$ and the critical value is given by $t_{\alpha/2}=1.96$