You find a nest of 300 mice in your barnYou call an exterminator and he sets out humane traps, which guarantees will cause the population to decay by 5,34% each week.

10

step-by-step explanation:

7+3=10

it will cost dollar $540

the living room is 3 which means if we divide 325/3 then we get $108

therefore if 1part of the living room cost $108 and 3 costed $325

then total 5part of the room will cost 5*108 which gives $540