The answer is B because A+B = your new set of numbers
For monthly membership, the cost must be less than $325. We can set up an inequality:-
100 + 30x < 325 where x = number of months of membership
Solving -
30x < 325-100 = 225
x < 225 / 30
x < 7.5 months
The answer is 7 months.
2,520/x = 60
x = 42, which means your answer is B.
2,520/42 = 60
There isnt enough information on this question, wheres the figure and the answers