Summary: Scientific Notation and Unitary Rates :)

Scientific Notation
-->Why do we use scientific notation?
      -used to simplify and express really large or really small numbers using powers of 10
**3.26 X 10⁷ (SCIENTIFIC NOTATION) = 32,600,000 (STANDARD FORM)**
Example: Express in scientific notation
a)5800 = 5.8 X 10³
b)0.004= 4 X 10^–3

Example: Express in standard form
a)6.3 X 10⁴ = 63,000
b)7.9 X 10^–6= 0.0000079

**MAKE YOUR LIFE EASIER BY USING A CALCULATOR FOR THE FOLLOWING TWO QUESTIONS :)**

*/*FOR PUNCHING IN EXPONENTS ON YOUR CALCULATOR USE 'E/Exp/X 10^x'*/*
Evaluate(Final answer in scientific notation)
a)(4 X 10⁴) + (9.8 X 10⁶)
40000+9800000
=9840000
=9.84 X 10⁶
b)(6.27 X 10⁶) X (8.67 X 10⁴)
=6270000 X  86700
=6356700
=6.3567 X 10⁶

**WATCH THE VIDEO-IT HELPS!**
http://www.youtube.com/watch?v=lYWP1Fjmwhg



Unitary Rates
Example. If.....
1m=100cm
....What would
1m² = ________cm²
Ans: 10,000cm²


Example: Convert
a) 9.2m³ to km³                                   *10³m = 1km³
9.2m³ X 1km³/10⁹m³                               *10⁹m³ = 1km³
=9.2 X 10^–9km

**WATCH THE VIDEO**
http://www.youtube.com/watch?v=lDEaJBBVD1A

BLOG ENTRY #1-SEPT.21.2010