Divide both sides with 9
s = 16
Answer: first sawmill charges more for each meter of wood. And first mill has a cheaper price for 5-meter wooden beam.
Step-by-step explanation:
P=5+20x. The first sawmill charges $20. Then 110-20/5-0=18 Which means The second sawmill charges $18 for each meter of wood. Since 20>18 The first sawmill charges more for each meter of wood.
P = 5+20x
=5+20x•5
= 105
The first mill charges $105 For a 5 meter beam while the second beam charges $110
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
Answer:
The amount of change she received is
$16.1
Step-by-step explanation:
1.what is asked in the problem?
We are to find how much change she received
what are the given facts?
She bought:
notebook which cost 23.75; a set of colored pens which cost 36.20 and a liquid eraser which cost 23.95
She gave the cashier $100
2.what operation to be used to solve the problem ?
Addition and Subtraction operation
3.solve
= $100 - ($23.75 + $36.20 + $23.95)
= $100 - $83.9
= $16.1
The amount of change she received is
$16.1
Answer:
there is no mode
Step-by-step explanation:
because there is no doubles