ANSWER:
850customers were served in the third week.
Step-by-step explanation:
First week = 730 customers
Second week = 696 customers
Difference between the first and second week = 730 - 696
= 34
4/100 x (customers served in the third week) = 34
4 x customers served in the third week = 34 x 100
4 x customers served in the third week = 3400
customers served in the third week = 3400/4
customers served in the third week = 850