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Airida [17]
3 years ago
12

Decide if this is a combination or permutation and then answer the question. Minnie has 4 different stamps. She needs 3 to mail

a large letter. How many ways can she pick the 3 that will be used?(pick two)
A. combination
B. permutation
C. 4
D. 3
E. 24
F. 12
Mathematics
1 answer:
Sergio039 [100]3 years ago
7 0
It is a combination, becasue the order does not matter

C (4,3) = 4! / [3! (4-3)!] = 4

Answer: A and C.




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HELP ME PLSSS Which of the following number sentences is an example of the associative property of multiplication?
MariettaO [177]

Answer:

The first or third one

Step-by-step explanation:

Associative property is where you can switch the place of the digits and it still have the same answer in the end.

4 0
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Help me pls thank you
Marianna [84]

Answer:

More than half the students scored 81 or better on the test

There were 12 students who scored 80 on the test

The same number of students scored between 81 and 90 on the test as scored between 61 and 80.

Step-by-step explanation: Please think this through, I don't know if I'm correct. It is either all or one of these

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2 years ago
Suppose that a fast food restaurant decides to survey its customers to gauge interest in a breakfast menu. After surveying multi
Harlamova29_29 [7]

Answer:

ME= \frac{Width}{2}=\frac{0.078}{2}=0.039

\hat p =0.688+0.039=0.727

\hat p =0.766-0.039=0.727

Step-by-step explanation:

Assuming that the confidence interval is (0.688; 0.766)

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".  

The population proportion have the following distribution  

p \sim N(p,\sqrt{\frac{p(1-p)}{n}})  

The confidence interval would be given by this formula  

\hat p \pm z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}  

For the 95% confidence interval the value of \alpha=1-0.95=0.05 and \alpha/2=0.025, with that value we can find the quantile required for the interval in the normal standard distribution.  

z_{\alpha/2}=1.96  

Use the confidence interval to find the point estimate and margin of error for the proportion

The margin of error is given by :

Me=z_{\alpha/2} \sqrt{\frac{\hat p(1-\hat p)}{n}}

And for our case we can find the width of the confidence interval like this:

Width =0.766-0.688=0.078

And the estimation for the margin of error would be given by:

ME= \frac{Width}{2}=\frac{0.078}{2}=0.039

Now we can find th point of estimate adding the margin of error to the lower limit of the interval or subtracting the margin of error to the upper limit, like this:

\hat p =0.688+0.039=0.727

\hat p =0.766-0.039=0.727

4 0
3 years ago
Choose the equation that could be used to solve for the missing side.<br><br> HELP ME PLZZZZZ!!
nexus9112 [7]

the answer is C because Cos is adj/hyp. Since there is only one option that even has cos involved, it must be the correct answer.

5 0
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28 students travel on a field trip. They bring a van that can seat 12 students. Elena and Kiran's teacher asks parents to drive
zubka84 [21]

Answer: Yes, you can use this inequality to find the numbers of cars required.

Step-by-step explanation:

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6 0
2 years ago
Read 2 more answers
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