http://www.irs.gov/businesses/small/article/0%2C%2Cid%3D102767%2C00.html
7 or 10 digits in the US. While much of the US has moved to ten digit dialing, rural areas still use seven digit dialing, omitting the common area code.
You move the decimal left or right until you end up with one digit in front of the decimal. Then, if you had to move the decimal to the left to get this number, you will have ten to the positive power of the number of decimal places moved. If you had to move the decimal to the right to get the number, you will have ten to the negative power of the number of decimal places moved. In this example, 5217000000 = 5.217 x 109
As the digits are moved left, the digit in the tenths column goes into the units column, the digit in the hundredths column goes into the tenths column, etc; each digit is ten times its previous value, thus moving the digits to the left multiplies the number by 10. Similarly moving the digits to the right: the digit in the units column goes into the tenths column, the digit in the tenths column goes into the hundredths column, etc; each digit is a tenth of its previous value, thus moving the digits to the right divides the number by 10.
To convert a number to scientific notation: · If the number has no decimal point, then add one at the end. · Then move the decimal point to just after the first digit while counting the number of places you have moved it. · The mantissa of the new number, formed after moving the decimal point is a. · If the original number is negative, then so is a. · The number of places to the left that the decimal point was moved is b. If it was moved to the right, then b is negative. For example: 23045.06 becomes 2.304506*10^4 -23045.06 becomes -2.304506*10^4 0.00023004 becomes 2.3004*10^-4
To write 180 in scientific notation, move the decimal point after the first digit, giving you 1.80. Then count the number of places you moved the decimal point. In this case, you moved it two places to the right. Finally, express the number 180 as 1.80 x 10^2 in scientific notation.
To convert a number to scientific notation:If the number has no decimal point, then add one at the end.Then move the decimal point to just after the first digit while counting the number of places you have moved it.The mantissa of the new number, formed after moving the decimal point is a.If the original number is negative, then so is a.The number of places to the left that the decimal point was moved is b. If it was moved to the right, then b is negative.For example: 23045.06 becomes 2.304506*10^4-23045.06 becomes -2.304506*10^40.00023004 becomes 2.3004*10^-4
Toll free numbers give many benefits to businesses. Notably, they improve customer satisfaction, since people do not have to pay when calling your business, and in instances where your business is moved, the business can still retain their phone number.
To write 70030000 in scientific notation, move the decimal point to the left after the first non-zero digit and count the number of places moved. In this case, the decimal point should be moved 7 places to the left, resulting in 7.0030000. Finally, multiply this number by 10 raised to the power of the number of places moved, giving the scientific notation of 7.0030000 × 10^7.
9.72 x 10-5 You put the decimal behind the first digit. Then count the number of places the decimal moved from its original position. This number becomes the exponent of the 10. If you move the decimal to the left, it is a positive number for the exponent. To the right, it is a negative exponent.
To convert a number to scientific notation: · If the number has no decimal point, then add one at the end. · Then move the decimal point to just after the first digit while counting the number of places you have moved it. · The mantissa of the new number, formed after moving the decimal point is a. · If the original number is negative, then so is a. · The number of places to the left that the decimal point was moved is b. If it was moved to the right, then b is negative. For example: 23045.06 becomes 2.304506*10^4 -23045.06 becomes -2.304506*10^4 0.00023004 becomes 2.3004*10^-4
To convert a number to scientific notation: · If the number has no decimal point, then add one at the end. · Then move the decimal point to just after the first digit while counting the number of places you have moved it. · The mantissa of the new number, formed after moving the decimal point is a. · If the original number is negative, then so is a. · The number of places to the left that the decimal point was moved is b. If it was moved to the right, then b is negative. For example: 23045.06 becomes 2.304506*10^4 -23045.06 becomes -2.304506*10^4 0.00023004 becomes 2.3004*10^-4
To convert a number to scientific notation: · If the number has no decimal point, then add one at the end. · Then move the decimal point to just after the first digit while counting the number of places you have moved it. · The mantissa of the new number, formed after moving the decimal point is a. · If the original number is negative, then so is a. · The number of places to the left that the decimal point was moved is b. If it was moved to the right, then b is negative. For example: 23045.06 becomes 2.304506*10^4 -23045.06 becomes -2.304506*10^4 0.00023004 becomes 2.3004*10^-4