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What is 245 million written in scientific notation?

How do u write this number in scientific notation?

Posted 169 day ago

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YummyCookies

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thank you 4 ur help!

Posted 169 day ago

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Answers (7)

YummyCookies 		thx for the correction, otherwise i would have been way off with my grade!

Posted 167 day ago

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jayteacher 		I agree with math_fanatic

Posted 167 day ago

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math_fanatic 		The first two answers given to this problem are wrong. Only the one given by MFB is correct.
It's 2.45 x 10^8

Posted 169 day ago

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YummyCookies 		thank you 4 ur help!

Posted 169 day ago

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MFB13 		Hi, the scientific notation of a number is customarily written where the decimal point is placed to the right of the first significant number. In this case, the decimal is placed between the 2 and the 4. Afterwards, if you write out the number in arithmetical or "long" notation which would be:

245,000,000

you then count the number of digits that you had to write after the decimal point which gives the number for the exponent. So in this case, after you place the decimal point after the digit two (always after the first digit), you should count a total of eight digits after the digit two. Thus you should write this number in scientific notation as:

2.45 x 10^8

Please also note that scientific notation makes it much easier to determine how many significant digits there are in a given number. In this case, the number of significant digits is three which is 2.45.
For example if someone wrote the same number as:

2.450 x 10^8 which can also be correctly wrtten this way as long as you mean that this number now has four significant digits (meaning more precise by a factor of 10 than the former number). Since a zero digit is written after the digit five here, this indicates that there are four significant digits in this number,
245,000,000. Again, if the same number is written as 2.4500x10^8, then this number has five significant digits. I hope you can see this pattern. Good luck.


Posted 169 day ago

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jdrew39 		2.45x10^6

Posted 169 day ago

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samzappala 		245*10^6 (Takes less room,)

Posted 169 day ago

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