match210.6

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Author:
_robg_
ID:
10547
Filename:
match210.6
Updated:
2010-03-15 00:15:54
Tags:
math 210 unit 6
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math 210 unit 6
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  1. Natural Numbers
    • counting numbers
    • {1,2,3, ...}
  2. Whole Numbers
    • counting numbers w/ 0
    • {0,1,2,3, ...}
  3. Integers
    {..., -3, -2, -1, 0, 1, 2, 3, ...}
  4. Rational Numbers
    • Numbers that can be expressed as a ratio of 2 other numbers a/b where b cannon equal zero
    • 3 = 3/1
    • 1/2 = 0.5
  5. Irrational Numbers
    • Numbers that cannot be expressed as a ratio of 2 numbers a/b
    • pi= 3.14... (never repeats, never terminates)
    • non-perfect squares √2, √3, √5
  6. Rules for working with integers
    • 1. For any number x, -x is termed the inverse of x if the following relationship applies:
    • x+(-x)=0
    • 2. For any # x, -(-x)=x
    • 3. 0 is neither positive or negative
  7. Absolute Value
    • for any # x, except 0, the absolute value will always be a positive number x
    • |x|>0
  8. Number Line
    • graph of all integers & everything else in between (fractions, decimals), all real numbers
    • 0 is origin
    • L»R increase
    • R«L decrease
    • absolute value tells how far from origin point
    • the number line is used to illustrate addition & subtraction of integers
  9. compound interest
    • A=P(1+r/n)nt
    • A= balance amount
    • B= principal
    • r= interest rate
    • n= compounding number
    • t= time
  10. compound interest
    $1,000, compounded quarterly, 3 years
    • P= $1,000
    • r= 8%
    • n=4
    • t= 3

    A= 1000(1+ .08/1)(4)(3)
  11. Scientific Notation
    • express very large & very small numbers
    • format: base x 10exponent or power
    • 10> base ≥ 1 exponent » integer
    • (1-9.999), 2.5x102

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