Answer:
you spend around 12 dollars to be exact 12.69 ha nice
The first answer is 7.7
the second one is 137.5
Answer:
Step-by-step explanation:
We want to determine a 95% confidence interval for the population mean.
Number of sample, n = 56
Mean, u = 645 hours
Standard deviation, s = 31 hours
For a confidence level of 95%, the corresponding z value is 1.96.
We will apply the formula
Confidence interval
= mean ± z ×standard deviation/√n
It becomes
645 ± 1.96 × 31/√56
= 645 ± 1.96 × 4.142
= 645 ± 8.12
The lower end of the confidence interval is 645 - 8.12 =636.88
The upper end of the confidence interval is 645 + 8.12 =653.12
Therefore, with 95% confidence interval for the population mean life of fluorescent light bulbs is between 636.88 hours and 653.12 hours
Answer:
I know the first one is A/the first one don't know the other ones
Step-by-step explanation:
Answer:

Step-by-step explanation:
So, when there were 4 innings left, the score was 17 to 6 and Kim was losing.
Since the score was 17 to 6, in order for her to win, they must've scored <em>at least</em> another 12 points.
This is because we are told that the other team didn't score, so their final score is 17.
And for Kim to win, they must have more points, so their must've scored at least 12 points for their score to be 18.
And we also know that they scored the same per inning for the next four innings.
Thus, in an inequality, this is:

The score per inning times 4 innings must be greater than or equal to 12:
Further notes:
To solve, divide both sides by 4:

In other words, Kim's team must've scored at least 3 points per inning.
Also note that this solution include <em>only integers</em>, since you can't score 3.5 points.