Answer:
Complex and imaginary number
Step-by-step explanation:
First, let's write the number in the form of
.
Since can be written in the form of
, where
and
are real numbers, it is a complex number.
Also, since , it is also an imaginary number.
is complex and imaginary.
The amount invested is $ 470
<h3><u>Solution:</u></h3>Given that , we have earned $131.60 as simple interest for an amount deposit at the rate of 4% for seven years.
We have to find the amount invested. That is, we need to find the principal sum
Let us use the simple interest formula
<em><u>The simple interest is given as:</u></em>
Here, simple interest = $ 131.60
Rate of interest = 4 %
Number of years = 7
principal = ?
Substituting the values in formula, we get
Thus the amount invested is $ 470