Respuesta :

AtomicAtom
you start out with multiplying 30 by 13 since 13 rooms are cleaned at a rate of $30 so 30 x 13 is 390 thrn you add your amount to get there so add $67 to $390 that equals $457
jcherry99

Remark

You have to assume all thirteen rooms are in the same building, otherwise the question is unanswerable.  

Givens

Visit = V = 67 dollars.

Charge/room = C = 30 dollars / Room.

Total = T = ??

Number of rooms = N = 13 rooms

Formula

T = V + C * N

Solve

T = 67 + 30 * 13

T = 67 + 390

T = 457 dollars. Answer