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Math stuff
Thursday, February 24, 2005
Math
Mood:  a-ok
Now Playing: the music in my head


Order of operations: please excuse my dear aunt sally.

P-----------------Parentheses (grouping symbols)
E-----------------Exponents
MD----Multiplication and Divison have equal priority
AS----Addition and Subtraction have equal priority

Fahrenheit_to_Centigrate

(F)=5/9(F-32)

Algebraic function definitions are patterns. The input variable is teh variable inside the parentheses. Whenever a function is evaluated, we replace that variable with a number and that same number must be copied dutifully everywhere else the variable appears in the formula.


Inverse-an inverse process will "undo" the work of another process or function.

example: C=5/9(f-32)

we see that this is basically the same relationship from the previous section. If F is teh temperature in degrees fahrenheit, then C is the equivalent tempereature in degrees celsius/centigrate.

in fact, whenever we have an equation and one variable is isolated ( on the left, usually) as we see here, we would say that "C is a function of F or C depends on the F". In theory, the variable F could have appeared more than once on the right side.

Could we use algebra to solve for F (isolate f instead)? Yes.


Pagathorean Theorem- right triangles and distances.

The two sides which form the right angle are called the legs. Their lengths are usually denoted by the letters a and b. The longest side opposite the right angle is the hypotenuse, usually denoted by the letter c.

Volume= 1/3 pie r square h


Application- time * rate= distance

Application- interest=principal*rate*time

Principal= the amount of money initially borrowed.

Rate= the rate of interest, typically expressed as a percent per year (per annum), but we always convert it to a deciaml number.

Time= the term of the loan, typically given in years.

At the end of the term, we must pay back the original principal plus the accured simple interest.



Posted by moon2/mumbojumbo85 at 1:33 AM EST
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