Providing a short wikipedia definition here: "In mathematics, a rational number is any number that can be expressed as the quotient or fraction"
So any fraction would work for this question I believe?
Answer: 6x^2-84x+294
Step-by-step explanation:
Use the foil method to solve (x-7)^2 and then multiply your result by 6.
Answer:
k= −2x−16
/x
Step-by-step explanation:
Step-by-step explanation:
Using the t-distribution, it is found that the p-value of the test is 0.007.
At the null hypothesis, it is <u>tested if the mean lifetime is not greater than 220,000 miles</u>, that is:

At the alternative hypothesis, it is <u>tested if the mean lifetime is greater than 220,000 miles</u>, that is:
.
We have the <u>standard deviation for the sample</u>, thus, the t-distribution is used. The test statistic is given by:
The parameters are:
is the sample mean.
is the value tested at the null hypothesis.
- s is the standard deviation of the sample.
- n is the sample size.
For this problem:

Then, the value of the test statistic is:



We have a right-tailed test(test if the mean is greater than a value), with <u>t = 2.69</u> and 23 - 1 = <u>22 df.</u>
Using a t-distribution calculator, the p-value of the test is of 0.007.
A similar problem is given at brainly.com/question/13873630