Posted by Anonymous on Monday, January 28, 2008 at 8:26pm.
In Simplifying 7 to the 11th power and 7 to the 9th power, Alexis decides to use her calculator to find 7 to the 11th power and 7 to the 9th power indiviually before dividing. Show how Alexis could use the laws of exponents to arrive at the answer more easily.

Math  Damon, Monday, January 28, 2008 at 8:37pm
assume you are doing
7^11

7^9
Which is
7^9 * 7^2

7^9
so 7^2
which is 49
to multiply, add exponents
to divide, subtract exponents
to raise to power, multiply exponents 
Math  Anonymous, Monday, January 28, 2008 at 8:40pm
thanks so much

Math  Damon, Monday, January 28, 2008 at 8:46pm
You are welcome !