The formula of the altitude of an equilateral triangle with side x:

We have:

Substitute:
<em>n = 4</em>
- <em>Step-by-step explanation:</em>
<em>Hi there !</em>
<em>²⁾2n + n/2 = ²⁾10</em>
<em>4n + n = 20</em>
<em>5n = 20</em>
<em>n = 20 : 5</em>
<em>n = 4</em>
<em>Good luck !</em>
The answer is 320 all you have to do is add 80 and you get 160 and add 160 you get 320
Step-by-step explanation:
<h2>l=P×R×T </h2>
=500×6/100 ×4
<h2> =120</h2>
<h2> compound interest </h2>