Answer:
If your trying to simplify then your answer would be 
Answer:
3 hours
Step-by-step explanation:
Answer:
d is right...............
The plot of the PDF shows the distribution is symmetric. This means that the mean is the same as the median, and that the 50% of the distribution lies to other side of this mean, i.e.

For this distribution,
.
Answer:
Step-by-step explanation:
nani