1. Formulas and Scientific Notation
MATH REVIEW
Formulas and Scientific Notation

2. Scientific Notation To write numbers in scientific notation:
Rewrite the number, placing the decimal point after the first nonzero digit
Drop all zeros before or after the last non-zero digit
Count how many places the decimal point has moved  becomes the exponent
If decimal moved left, exponent is positive
If decimal moved right, exponent is negative

3. Scientific Notation putting terms in expanded form
The exponent tells you how many places to move the decimal
The sign tells you the direction

4. Reliability in Measurement
Precision: How repeatable your measurements are
Accuracy: How close your measurement is to the accepted value

5. *an identifiable physical property
Density
The quantity of matter in a given amount of space
D = M/V
*an identifiable physical property

6. Percent Error How closely your measured value is to the accepted value
Table T
Expressed as an absolute value
%E = measured – accepted x 100
accepted