ANSWER

EXPLANATION
The polar form of a complex number ,

is given by:

where

The given complex number is:




And



Hence the polar form is :

40*1.2=48
1 represent the entire amount and .2 represents the tax added. When multiplied it would give you 48 as the final price.
Answer:
B:
Step-by-step explanation:
Answer:
A discount of 24%
Step-by-step explanation:
100 x 0.8 x 0.95
=76
Given :
A line 2x + 1 =0 .
To Find :
The slope of the given line .
Solution :
We know , slope of line is given by the tangent of the angle between the x-axis and the line .
Now, for line 2x + 1 =0 i.e
.
The line is perpendicular to x-axis and cuts the x-axis at
.
Therefore , the angle between the line and x-axis is
.
So , slope
i.e undefined .
Therefore , the slope of given line is not defined .
Hence , this is the required solution .