What is the value of the dot on the number line?

-2.1 to -2.4( my guess would be .3)

Step-by-step explanation:

the middle line refers to.5 so the dot since its not indicated could be referred to as-2.3

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