Box-office receipts the total worldwide box-office receipts

Question

Question: BOX-OFFICE RECEIPTS The total worldwide box-office receipts for a long-running blockbuster movie are approximated by the function

T(x) =  120x²  
          x² + 4

where T(x) is measured in millions of dollars and x is the number of months since the movie's release.

a. What are the total box-office receipts after the first month? The second month? The third month ?

b. What will the movie gross in the long run (when x is very large)?