Answer:
Before the 5th month , site b will be less expensive than site a .
Step-by-step explanation:
Let's assume , after x moth site b will charge same as site a ,
So, the total collected fee by site a is , ( x × 5 ) $ and including start-up fee
it will be {( x × 5 ) + 50 } $ as 5 $ was charged per month .
Now , total collected fee by site b is , ( 15 × x ) $ as charge for one month is , 15x $
As it's considered that total fee is equal generated by site a and site b ,
∵ The generated equation is ,
5 x + 50 = 15 x
or , 10x = 50
or, x = 50/10
or, x = 5
Before the 5th month , site b will be less expensive than site a .
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