Answer:
$6,000
Step-by-step explanation:
The mean value of a sample is assumed to be the same as the mean of the population. The mean of a uniformly distributed variable between 0 and 160 is:

If the mean cost for each machine is $80, the mean aggregate cost for a sample of 75 machines is:

The mean aggregate maintenance cost is $6,000.
The common difference is 4. If you look at the numbers 1 and 5, there is a difference of 4. If you look at 5 and 9, there is also a difference of 4. If you look at 9 and 13, there is a difference of 4. Therefore, in this arithmetic sequence, the common difference is 4.
I can conclude that they will also share a same side
Answer:
<h2>2 1/4 h = 2.25 h</h2>
Step-by-step explanation:
From 1:45 to 4:00 is:
15 min to 2:00
from 2:00 to 4:00 is 2h
We know 1h = 60min, therefore 1min = 1/60 h
2h and 15min = 2h + 15/60 h = 2h + 1/4 h = 2 1/4h = 2.25h