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padilas [110]
4 years ago
13

How do I do this equation?

Mathematics
1 answer:
umka2103 [35]4 years ago
6 0
I am doing this in school right now but I just started.
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if a mobile was sold for Rs.24408 after allowing 10% discount on the marked price and adding 13% VAT.Findthe discount amount.
Kazeer [188]

Answer:

<em>Hi</em><em>,</em><em> </em><em>there</em><em>!</em><em>!</em><em>!</em><em>!</em>

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3 years ago
Help meeeeeeeeeeeeeee
Pavlova-9 [17]

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8 0
1 year ago
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weight per apple they ship is 120 grams with a standard deviation of 12 grams. Data generated from a sample of 49 apples randoml
astra-53 [7]

Answer:

The 95% confidence interval for the mean weight per apple is between 119.14 and 125.86 grams per apple. This means that we are 95% sure that the true mean weight per apple for all the apples they ship is between 119.14 and 125.86 grams per apple.

Step-by-step explanation:

We have that to find our \alpha level, that is the subtraction of 1 by the confidence interval divided by 2. So:

\alpha = \frac{1-0.95}{2} = 0.025

Now, we have to find z in the Ztable as such z has a pvalue of 1-\alpha.

So it is z with a pvalue of 1-0.025 = 0.975, so z = 1.96

Now, find the margin of error M as such

M = z*\frac{\sigma}{\sqrt{n}}

In which \sigma is the standard deviation of the population and n is the size of the sample.

M = 1.96\frac{12}{\sqrt{49}} = 3.36

The lower end of the interval is the sample mean subtracted by M. So it is 122.5 - 3.36 = 119.14 grams per apple

The upper end of the interval is the sample mean added to M. So it is 122.5 + 3.36 = 125.86 grams per apple

The 95% confidence interval for the mean weight per apple is between 119.14 and 125.86 grams per apple. This means that we are 95% sure that the true mean weight per apple for all the apples they ship is between 119.14 and 125.86 grams per apple.

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3 years ago
Mike can plow a field in 12 hours and his brother Phil can plow it in 15 hours. How long will it take them to plow it if they us
bezimeni [28]
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3 years ago
Plz help 52 points
Troyanec [42]

-3t < -78

÷-3      ÷-3

_________

t > 26

78÷26=3

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