Answer:

Step-by-step explanation:
Given 
To make A as the subject of the formula we need to rearrange
Divide by
throughout we get


Answer:
Yes it's 81
Step-by-step explanation:
9 x 9 = 81
9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 + 9 = 81
Your welcome
82 percent would be ur answer