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3 years ago

6^2+17+12 help me plz.

Mathematics

2 answers:

Karo-lina-s [1.5K]3 years ago

7 0

6 squared is 36 because 6x6=36.
Then all you have to do is 36+17+12
which should be: 65

Dmitry_Shevchenko [17]3 years ago

4 0

6^2 + 17 + 12

First, let's start with $6^{2}$ . Basically, the '2' above the 6 indicates that the number appears twice in multiplying. $6^{2}$ can be described as 6 × 6 as well. 36 should be your answer for 6 squared.
$6^{2} = 6 \times 6 = 36$

Second, our problem should look like: 36 + 17 + 12. One can simply do this on a calculator or count on their fingers. Once you add all of the numbers up, you should get 65.

Answer: $\fbox {65}$

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The manager of a grocery store has taken a random sample of 100 customers. The average length of time it took these 100 customer

AlladinOne [14]

Answer:

$4-2.326\frac{1}{\sqrt{100}}=3.767$

$4+2.326\frac{1}{\sqrt{100}}=4.233$

So on this case the 98% confidence interval would be given by (3.767;4.233)

Step-by-step explanation:

Previous concepts

A confidence interval is "a range of values that’s likely to include a population value with a certain degree of confidence. It is often expressed a % whereby a population means lies between an upper and lower interval".

The margin of error is the range of values below and above the sample statistic in a confidence interval.

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

$\bar X=4$ represent the sample mean

$\mu$ population mean (variable of interest)

$\sigma=1$ represent the population standard deviation

n=100 represent the sample size

Solution to the problem

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

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

Since the Confidence is 0.98 or 98%, the value of $\alpha=0.02$ and $\alpha/2 =0.01$ , and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.01,0,1)".And we see that $z_{\alpha/2}=2.326$

Now we have everything in order to replace into formula (1):

$4-2.326\frac{1}{\sqrt{100}}=3.767$

$4+2.326\frac{1}{\sqrt{100}}=4.233$

So on this case the 98% confidence interval would be given by (3.767;4.233)

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3 years ago

The school cook made 30 pounds of potato salad for the school picnic. How many servings is this if each serving is 1/4 pound?

iren2701 [21]

120 servings.
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3 years ago

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Step-by-step explanation:

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2 years ago

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Romashka-Z-Leto [24]

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