Which statement is modeled by the expression?
  
The Perez family drove 500 miles each day of their vacation. If their vacation lasted for n days, then  500n is the total number of miles they traveled on their vacation.                      
The community theater had a capacity of 500 seats. If n is the number of tickets sold for a performance, then  500n is number of seats that were left empty for that performance.                                                                                                                      
Jody had 500 dollars in her savings account. She withdrew n dollars to buy some camping supplies. She then had 500n dollars left in her savings account.                           
A store had 500 apples to be placed in bags with an equal number of apples in each bag. If n is the number of bags to be used, then 500n is the number of apples in each bag..