Maria do 1/2 work in 1 hour
Sasha do 1/3 work in 1 hour
Thus,
1/2+1/3=5/6 work in 1 hour
5/6 work in = 1 hour
1 work in =6/5=1.2 hours =72 minutes
They should receive 72 each 362 divided by 5 (number people)
Part A
The given expression is:

We expand to get:

Note that 



Part Bi)
The given expression is;

We simplify to get:


Note that:


This is now of the form
, where
.
This explains why it is a complex number;
Part bii)
The given expression is :

We simplify to get





Part C
We want to simplify:

We rewrite in terms of 


