Answer:
b. 9.2 minutes
Step-by-step explanation:
To find the expected waiting time for a random call from the sampie given by using the formula:
number of calls (x) waiting time f(x) in minutes f(x) *(x)
0 0 0
2 3 6
4 10 40
6 15 90
8 10 80
10 6 60
Therefore:
Fort Sumter, Battle of Bull Run, <span>Battle of Shiloh, Battle of Vicksburg and Battle of </span>Gettysburg
27.30/3 = x/1
then divide both sides by 3
27.30 divided by 3 is 9.1
therefore, the answer is $9.10
First step is distribution:
-(6-5n)+12
-6+5n+12
5n+6=-6+5n+15
Second step combine like terms:
5n+6=5n+9
-6 -6
5n=5n+3
0=3
