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AFK please help still
I think the book made a typo on these thats why I need help.
They all look like they are in scientific notation already
i mean standard form :P silly me
if you have some number given as:\[a.bcde\times10^x\]then this just means move the decimal place x number of times to the right. if x was negative, then it means move it x places to the left.
Ummm still kinda confused can you show me this one 6.678x10^2
as an example cause I'm still confused
we moved the decimal point 2 places to the right because we have to the power of 2.
but wouldn't the decimal be a comma and how many zeros would be at the end?
no - comma's are generally used to group numbers into groups of three - to make them easier to read. e.g.:\[1,376,234.023\]
like 5.9 x 10^2 it would be 590 right?
because those are the only ones in my book like that. the rest are like 5 x 10^11/ 3.4 x 10^3 etc.
yes that is correct because: |dw:1349822896694:dw|
so if the decimal point needs to move right by more places than you have digits, then you just keep adding zeros to the number
hope it's making sense now
yea i see i see :D thank youz :)
\[6.678\times10^2=667.8\]as I showed up above.
so it has no comma
you only add extra zeros to the number if the power of ten means it has to go beyond the digits already available
ohhhhhhhhhhhhhhhh ok so these 9.9673x10^2, 7.02x10^1 would have decimals and not commas too?
and again, comma's are only used to separate digits into groups of three to make the number easier to read. so if the number has 3 or less digits (before the decimal point), then you would not have any comma. some examples of comma usage: 123.12 1,123.12 12,123.12 1,123,123.12
oh ok :)
so strategy is: 1) convert the number from scientific notation to standard form 2) group every 3 digits to the left of the decimal point with comma's