<h2>
Answer with explanation:</h2>
Let 
be the population mean lifetime of circulated $1 bills.
By considering the given information , we have :-
Since the alternative hypotheses is two tailed so the test is a two tailed test.
We assume that the lifetime of circulated $1 bills is normally distributed.
Given : Sample size : n=50 , which is greater than 30 .
It means the sample is large so we use z-test.
Sample mean : 
Standard deviation : 
Test statistic for population mean :-
The p-value= 
Since the p-value (0.0433834) is greater than the significance level (0.02) , so we do not reject the null hypothesis.
Hence, we conclude that we do not have enough evidence to support the alternative hypothesis that the average lifetime of a circulated $1 bill differs from 18 months.
Answer:
x = 30 I'm sure hope this helps
C) -1 is the answer to this question
A. $6800 + $1360= $8160 total cost
b.
$68.85 each * 165 bracelets = $11360.25
$11360.25- $8160 total cost = $11278.75 profit
$11278.75 profit/$8160 total cost= 1.38218
1.38218= about 138%
Final answer: 138%
Warning: This answer will vary if you find the percent over cost (not including duty).
Answer:
Juan wins the race
Step-by-step explanation:
<em>The complete question is attached.</em>
<em />
Time is on the horizontal axis.
Distance is on the vertical axis.
If you look first at y-axis (vertical), you will see that both lines (curves) go upto a distance of 4 miles. So, the race is of 4 miles. Both of them finish.
Now,
If you look at the corresponding x-axis value of where each curve ends, you will see:
Antonio finishes at 15 mins
Juan finishes at 13 minutes
So we can successfully say that Juan wins the race since he finishes 2 mins faster than Antonio.
Juan wins the race
