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AlexFokin [52]
3 years ago
8

(1 point) a bookshelf has space for exactly 13 books. in how many ways can the books be arranged on the bookshelf?

Mathematics
1 answer:
Andre45 [30]3 years ago
6 0
I believe the answer is <span>6,227,020,800</span>
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In a random sample of 26 residents of the state of Montana, the mean waste recycled per person per day was 2.8 pounds with a sta
Rainbow [258]

Answer:

The critical value that should be used in constructing the confidence interval is T = 1.316.

The 80% confidence interval for the mean waste recycled per person per day for the population of Montana is between 2.741 pounds and 2.859 pounds.

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 26 - 1 = 25

80% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 25 degrees of freedom(y-axis) and a confidence level of 1 - \frac{1 - 0.8}{2} = 0.9. So we have T = 1.316

The critical value that should be used in constructing the confidence interval is T = 1.316.

The margin of error is:

M = T\frac{s}{\sqrt{n}} = 1.316\frac{0.23}{\sqrt{26}} = 0.059

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 2.8 - 0.059 = 2.741 pounds

The upper end of the interval is the sample mean added to M. So it is 2.8 + 0.059 = 2.859 pounds.

The 80% confidence interval for the mean waste recycled per person per day for the population of Montana is between 2.741 pounds and 2.859 pounds.

4 0
3 years ago
Answer questions Correctly for brainly​
morpeh [17]

Answer:

x=\frac{13}{6}

Step-by-step explanation:

2x +2/3=5

x=13/6

5 0
3 years ago
Maria releases a javelin 1.5 meters above the ground with an initial vertical velocity of 22 meters per second. How long will it
Korolek [52]
The javelin will hit the ground 14.66 or 15 seconds upon Maria's release from the said distance. The computation are as follows: 

time = distance/speed (d/m)
time = 22 meters/second / 1.5 meters 
time = 14.66 seconds or 15 seconds 
3 0
3 years ago
Write a division problem. Show two different ways that you can estimate the quotient using compatible numbers.
Levart [38]
98 divided by 7


1. 98-round to 100
    7-round to 10

100 divided by 10=10

So 98 divided by 7 is about 10

That is one way

3 0
3 years ago
Mike walked 3 miles in 45 minutes. What was his rate in miles per hour? A 1/4 miles per hourB 2 1/4 miles per hour C 4 miles per
Lemur [1.5K]

Answer:

4 miles per hour

Step-by-step explanation:

I took it on k-12

5 0
2 years ago
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