The equation is 
The solved equation is 11
First, we must add 13 on both sides

The answer to the equation is 
It is good equation. Look, that:
81 = 3 x 3 x 3 x 3 = 3^4.
So you have to solve:
3^x = 3^4
exponents have to be the same, so
x=4
That's mean that A(4) = 81
Yes. When solving a problem like this, multiply the base numbers normally, and add the exponents together.
If you need more help, comment below and I'd be happy to assist.
The altitude is the mean proportional between the left and right parts of the hyptenuse

Answer: 14.1
Answer:
327
Step-by-step explanation:
In the thousands cateragory of the number lies the numbers 327 giving you your answer