WORD OF WARNING

# WORD OF WARNING - WORD OF WARNING If you use a calculator...

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WORD OF WARNING: If you use a calculator to work with numbers in scientific notation, your calculator may write them in a way that they are not normally written. For example, the number 3.4 x 10 22 could appear in your calculator like 3.4 22 or 3.4 22 . The "x 10" part is often excluded to save space. If you were to do a calculation and your calculator gives an answer similar to that shown above (without the "x 10" part), make sure you write the number out correctly - don't forget to write out the "x 10" part. Why? There is a big difference between those numbers. If your calculator displays 3.4 22 , and you write on your answer sheet 3.4 22 , you'll lose points, since 3.4 22 means 3.4 taken to the power of 22, not what it is supposed to mean (3.4 x 10 22 ). That's a big difference - don't be lazy; write out the number properly. When do you use scientific notation? This is one of those questions that doesn't have a solid answer. If you have a number like -0.2, or 123, you really don't need to write them in scientific notation, since that would be a bit silly and make the number harder to read. In general it is best to use scientific notation if the number is in the millions or greater, or if it is smaller than 0.001. While these are only guidelines you should do whatever you are comfortable with.

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## This note was uploaded on 11/22/2011 for the course AST AST1002 taught by Professor Emilyhoward during the Fall '10 term at Broward College.

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WORD OF WARNING - WORD OF WARNING If you use a calculator...

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