Answer:Total amount of money collected for arena J = $5400
Step-by-step explanation:
Section J in an arena has 20 rows.
Each row has 15 seats. This can also means that section J has 20 rows and 15 columns. The rows and column form a rectanglar shape. This means that the total number of seats would be number of rows × number of columns
= 15 × 20 = 300 seats
All tickets cost $18 each. If all the seats are sold, that means that each seat cost $18 each.
Total amount of money collected for arena J would be total number of seats × the cost per seat.
Total amount of money collected for arena J = 300 × 18 = $5400
