Julie had the following gas bills: January, $135.98; February,
$128.54; March, $98.76. What is her average monthly expense for gas?
a. $363.28
b. $121.09
c. $130
d. $40.36
To find the average monthly expense for gas, you need to add up the total expenses for the three months and then divide by the number of months (which is 3):
$135.98 + $128.54 + $98.76 = $363.28
$363.28/3 = $121.09
Therefore, the answer is (b) $121.09.