If cos40= a, what is sin50 in terms of a?
a) a
b) 1/a
c) 90-a
d) a sr2

step-by-step explanation:

a. is correct

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