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VashaNatasha [74]
2 years ago
12

A bakery offers a sale price of $3.30 for 3 muffins. what is the price per dozen?

Mathematics
1 answer:
aivan3 [116]2 years ago
5 0

Answer:

$13.20

Step-by-step explanation:

A dozen consists of 12 items. If you have 3 you must multiply the current amount by 4 to get 12. Therefore you must also multiply the price by 4.

3.30*4=13.20

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The U.S. Census Bureau conducts a study to determine the time needed to complete the short form. The Bureau surveys 200 people.
NISA [10]

Answer:

8.2-2.58\frac{2.2}{\sqrt{18}}=6.86    

8.2+2.58\frac{2.2}{\sqrt{18}}=9.54    

So on this case the 90% confidence interval would be given by (6.86;9.54)    And the error is given by:

ME= 2.58\frac{2.2}{\sqrt{18}} =1.338

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=8.2 represent the sample mean for the sample  

\mu population mean (variable of interest)

\sigma=2.2 represent the population standard deviation

n 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 0.90 or 90%, the value of \alpha=0.1 and \alpha/2 =0.005, and we can use excel, a calculator or a table to find the critical value. The excel command would be: "=-NORM.INV(0.005,0,1)".And we see that z_{\alpha/2}=2.58

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

8.2-2.58\frac{2.2}{\sqrt{18}}=6.86    

8.2+2.58\frac{2.2}{\sqrt{18}}=9.54    

So on this case the 90% confidence interval would be given by (6.86;9.54)    And the error is given by:

ME= 2.58\frac{2.2}{\sqrt{18}} =1.338

8 0
3 years ago
Read 2 more answers
Please help me with this!!
Sergeu [11.5K]

Answer:

yea

Step-by-step explanation:

3 0
3 years ago
PLS BE QUICK AND pls have explanation. Wrong or spam will be reported
rusak2 [61]

The price of each caramel macchiato is $5.60

What is the correct function in this case?

The appropriate function is the one that considers the initial amount of $35 , the amount spent for 5 caramel macchiatos, and the balance left which is $7 after the purchase

This means the $35 minus the amount spent equals $7

let us assume that the price per item is x for 5 items, then he spent 5x

35-5x=7

35-7=5x

28=5x

x=28/5

x=$5.60

Find out more about cost on:brainly.com/question/14909163

#SPJ1

3 0
1 year ago
Give the value of x.<br> 128 2x
sattari [20]
The answer is x=64 hope this helped
4 0
3 years ago
Which shows the best use of the associative and commuative properties to make simplifying 2/7-17+6-5/7+1
emmainna [20.7K]

Answer:

I think the answer would be -\frac{73}{7}

Step-by-step explanation:

5 0
3 years ago
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