Write the complex number in the form a + bi. 3(cos 270° + i sin 270°)

Given the complex number:  

Let

we have to write this complex number in the form of a+ib.

We know :

Then;

or

Therefore, the given complex number in the form of a+ib is, 0-3i

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

step-by-step explanation: