Today you will
divide monomials using the properties of exponents
and
simplify expressions containing negative and zero exponents
7.2 Division Properties of Exponents
Quotient of Powers
x5
x2
Power of a Quotient
x
2
3
( (
Zero Exponent
w5
w5
Negative Exponent
n3
n8
5 xy
15 w 3
-1
( (
2
3
x3
y4
-2
( (
-2
( (
10
b
n3
The order of magnitude of a quantity is the
number rounded to the nearest power of ten.
It's used to compare measures and to estimate and
perform rough calculations
Example:
11
The power of 10 closest to 95,000,000,000 is 10
11
So the order of magnitude of 95,000,000,000 is 10
The average height of a man is 1.7 meters.
The average height of an ant is 0.0008 meter.
How many orders of magnitude as tall as an ant is a man?