Answer:

Step-by-step explanation:

The first step is to add -5 to both sides:

The next step is to divide 3 on both sides:


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:
Fixed cost $14 -350 messages
variable $ 0.25 each message<u> i think</u>
Step-by-step explanation: