
 Scientific notation  Wikipedia, the free encyclopedia (Site not responding. Last check: 20071022) 
  In scientific notation, however, multiplying a number by 10 increases the exponent by one, for example from $10^1$ to$ 10^2$ .$$$$ 
  Remember then, when reading numbers in scientific notation, that small changes in the exponent equate to large changes in the number itself: $2.5\; \backslash times\; 10^5$ dollars\; (\$250,000)\; is\; a\; common\; price\; for\; new\; homes\; in\; the\; U.S.,\; while$ 2.5\; \backslash times\; 10^\{10\}$ dollars\; (\$25billion)\; would\; make\; you\; one\; of\; the\; world\text{'}s\; richest\; people.$$$$ 
  Formally, scientific notation (also known as standard index notation) is floatingpoint notation with radix (base) 10. 
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