Pi is an irrational number, with an infinite number of decimal digits. (It has an infinite number of digits in any base.) As such, it cannot be represented exactly in any finite calculator.
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Unless you are meaning something more specific, ratios are calculated through simple division. For example if there are 2 oranges and 4 apples, the ratio of oranges to apples is 2:4, and the ratio of oranges to the total number of pieces of fruit is 2:6. These ratios can also be expressed in fraction form: there are 2/4 as many oranges as apples, and 2/6 of the pieces of fruit are oranges. If necessary you can perform the calculation 2/4 = 2 therefore there are .5 (half) as many oranges as apples and 2/6 = 0.33333333333333 therefore approximately .333 pieces of fruit are oranges.
On your calculator you should simply need to use the division button to accomplish this.
Well, the calculator has a limited display screen. If a result exceeds the display capabilities of the calculator it is displayed in scientific notation. If the number is larger than 69 the calculator is not able to calculate its factorial. If you are using some of the combination and permutation functions it is better to use the keys dedicated to them nPr, and nCr.
get pi - please help!!
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