I believe that number would be 6.
1/3n-12= -10
+12 +12
_________
1/3n = +2
x3 x3
_________
n = 6
It would be: 6 ( 6- 4)
= 6 ( 2)
= 12
So, Your Answer would be 12
Hope this helps!
Answer:
volume = 84
Step-by-step explanation:
simple: volume = base x height
6 x 14 = 84
Easy example that shows

:
Let

.
Then

.
So

, or

, and so

.
The basic idea is to find the period of the repeating decimal, move the

digits belonging to one period over to the left of the decimal point by multiplying by

, then subtract the original repeating decimal from this new number, and finally divide by

.
A slightly more complicated example:
Let

.
Then

.
Then

, or
To find the current salary, we take 10% of $25 (the raise), then add it back into the current salary.
Current salary = (25×10%) + 25
= (25 × .10) + 25
= 2.50 + 25
= $27.50
So his raise was 2.50 and he now makes $27.50