DEPRECATED Representing relationships with matrices

Problem

The cost of a baseball ticket depends on the seat location and whether the game is against a popular team or not. Below is a matrix that contains the cost of a ticket for prime and far-away seats for a popular team and an unpopular one. The rows represent the location of the seat, while the columns represent team popularity.
[30451012] \qquad \left[ \begin{array}{cc} 30 & 45 \\ 10 & 12 \end{array} \right]
If a far-away seat at an unpopular team costs dollar sign, 10, how much does it cost to buy 4 tickets for prime seats to see an unpopular team?
The tickets will cost dollar sign
  • Your answer should be
  • an integer, like 6
  • an exact decimal, like 0, point, 75
  • a simplified proper fraction, like 3, slash, 5
  • a simplified improper fraction, like 7, slash, 4
  • a mixed number, like 1, space, 3, slash, 4
.
Do 7 problems