# Math

How do I express a decimal in scientific notation? I know how to do it with whole numbers, but don't know what the rules are when the number is something like .00075.

1. 👍 0
2. 👎 0
3. 👁 145
1. the decimal is always placed after the first signigicant digit, in your case 7.5, then count the number of decimal places it was moved. That becomes your exponent of 10
if you had to move to the right, the exponent is negative, if you moved to the left, the exponent is positive.
so .0075 = 7.5 x 10-4

34567.21 = 3.456721 x 104

1. 👍 0
2. 👎 0
posted by Reiny

## Similar Questions

1. ### Scientific Notation

Just started learning about the scientific notation, and its actually quite easy, but I don't know why im still struggling with it. For example it says express the following measurements in scientific notation: 5800m The answer is

asked by Anonymous on September 9, 2011
2. ### Math

Use scientific notation to divide the following two numbers. Express the answer using scientific notation; retain at least three decimal places. 6.2 • 107 / 4.15 • 103

asked by Jackster on March 1, 2011
3. ### Algebra

Use scientific notation to multiply the following two numbers. Express the answer using scientific notation; retain all nonzero decimal places (1.9 • 10^4) • (8.4 • 10^5)

asked by yolanda on January 2, 2012
4. ### algebra

use scientific notation to multiply the following two numbers. Express the answer using scientific notation; retain all nonzero decimal places. (8.1*10^8)*(4.2*10^3)

asked by sharron on July 9, 2011
5. ### Intermediate Algebra

Use scientific notation to divide the following 2 numbers .Express the answer using scientific notation; retain at least3 decimal places (9.4*10^6)/(4.97*10^2)

asked by sherry on March 27, 2012
6. ### algebra

Use scientific notation to divide the following two numbers. Express the answer using scientific notation; retain at least three decimal places. (6.2 · 10^7) / (4.15 · 10^3)

asked by jackie on January 29, 2012
7. ### BA

use scientific notation to divide the two numbers, express answer using scientific notation, retain at least 3 decimal place for (8.4.10^6)/(5.97.10^2)

asked by Dechols on February 24, 2012
8. ### intermediate algebra

use scientific notation to divide the following two numbers. Express the answer using scientific notation; retain at least three decimal places (8.4*10^6)/ (5.97*10^2)

asked by swirl on July 9, 2011
9. ### algebra

Use scientific to divde the following two numbers. Express the answer using scientific notation; retain at least three decimal places. (8.16*10^5)/(1.03*10^2)

asked by Destiny on September 21, 2011
10. ### Math

I asked this question before sorry I I shouldn't ask it again. Express the following number in scientific notation: 23^941 How do i get the answer for this? on my graphing calc, i get an error overflow messasge when i try to

asked by Sandy on March 11, 2012
11. ### PHYSICS

Express following measurements in scientific notation. 1. a) 5800 m I don't even get what scientific notation is. In my book its ays, that in Scientific notation, the numerical part of a measurement is expressed as a number

asked by Anonymous on September 8, 2011

More Similar Questions