Explain how the quotient of powers property was used to simplify this expression.
3^4/9 = 3^2
1. by simplifying 9 to 32 to make both powers base three and adding the exponents
2. by simplifying 9 to 32 to make both powers base three and subtracting the exponents
3. by finding the quotient of the bases to be one third and simplifying the expression
4. by finding the quotient of the bases to be one third and cancelling common factors