Desert Shores is below the sea level and the difference is more than 600 feet
Answer:
84 sqmm
Step-by-step explanation:
hope it helps. ........።..
Answer:68.27%
Step-by-step explanation:
TI84
2nd distr
normalcdf(89,97,93,4)
Answer:



Step-by-step explanation:
Given

Solving (a): Point estimate of difference of mean
This is calculated as: 


Solving (b): 90% confidence interval
We have:


Confidence level is: 



Calculate 


The z score is:

The endpoints of the confidence level is:






Split


Hence, the 90% confidence interval is:

Solving (c): 95% confidence interval
We have:


Confidence level is: 



Calculate 


The z score is:

The endpoints of the confidence level is:






Split


Hence, the 95% confidence interval is:
