Answer:
The elevator is now on the 2nd floor.
Step-by-step explanation:
15 - 18 = -3
-3 + 5 = 2
Answer:
64(64-6) = 3712
Step-by-step explanation:
64(64 -6)
64-6 = 58
64(58) = 3712
Answer:


And we can conclude that the true mean for the heights of mens between the ages of 18 to 24 is between 69.44 and 69.7 inches.
Step-by-step explanation:
For this case we have the following sample size n =772 from men recruits between the ages of 18 to 24
represent the sample mean for the heigth
represent the population standard deviation
We want to construct a confidence interval for the true mean and we can use the following formula:

The confidence level is 0.99 or 99%o then the significance level is
and
and if we find for a critical value in the normal tandar ddistirbution who accumulates 0.005 of the area on each tail we got:

And replacing we got:


And we can conclude that the true mean for the heights of mens between the ages of 18 to 24 is between 69.44 and 69.7 inches.
Answer:
B, C, F
Step-by-step explanation:
Given:

Subtract the second equation from the first equation:

Option B "The x coordinate of the solution is 9" is ture
Substitute it into the first equation:

Option F "The y coordinate of the solution is -8" is true.
Point (9,-8) is in the IV quadrant, so option C is true.
Reduce 2 ,1 by 2 plus 2 ,1 by 3 minus 1 ,1 by 4