by Dirtman » Sat Sep 16, 2006 5:05 pm
Yo:
There are 1,000 milligrams in 1 gram so;
450,000 grams * 1000 = 450,000,000 milligrams.
4.5 x 10^-1 is scientific notation for 0.45. It’s also referred to as exponential notation. On a calculator or computer, where a superscript font isn’t available for the exponent, it can also be written as 4.5E-1. “E” simply stands for exponent.
Scientific notation is shorthand for writing very large or small numbers in a shorter format. Examples (using the numbers above):
450,000 can be written 4.5E+5.
450,000,000 can be written 4.5E+8
For more information, do a Google search for “scientific notation”.
George