Anonymous
Anonymous asked in Science & MathematicsChemistry · 10 years ago

how do you convert this measurement of cm to km?

837498 cm to km.

the answer should be in scientific notation. please help

10 Answers

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  • 10 years ago
    Best Answer

    837498 cm --- any decimals in there??? What a nonsense number. Certainly not a realistic measurement. I always make it a point to give my students something that is within the realm of reality to work on.

    Anyway.

    837498 cm x (1 m / 100 cm) x (1 km / 1000 m) = 8.37498 cm

    Why would that need to be given in scientific notation? Answer: It wouldn't. Scientific notation is useful for large and small numbers, like anything over 10,000 or less than 1/100.

    ============ Follow up =============

    Manikore wrote: "in scientific notation, that would be

    8.37498 * 10^1".

    NO!!!! It wouldn't. 8.37498x 10^1 is 83.7498

    If you must write your answer in scientific notation then it is 8.37498 x 10^0.

    That is 10 to the zero power. Anything, including 10, raised to the zero power is equal to 1. And 1 x 8.37498 = 8.37498.

    =========== A bit more =============

    A decimal is that little round, pointy thing. If there isn't one of those anywhere in a number, then there is no decimal point. There is an UNDERSTOOD decimal point at the end of a number, but that isn't quite the same thing as that little pointy thing.

  • 10 years ago

    How pathetic the US didn't go metric. It IS a stupid number! Would you measure something as 837498 inches? Why would you measure something that big in centimetres? And no, there is no decimal point IN there - of course there's one understood to be at the end, James, that wasn't the point. Guess you were attentive in math class at least one day. How many miles is that many inches? And you can't just "move the decimal point" - it's not a decimal based system. The US is now stuck with people who can't manipulate their own antiquated system or the metric system either. Or scientific notation. It is x 10^0 km; if you insist on using x 10^5, don't forget to leave the units as cm, which will ensure your answer is incorrect - it's supposed to be km.

  • 10 years ago

    well i know a km is 1000 meteres

    and im just gonna think for a tad

    a meter must be like 1000 cm

    or no wait. its like 100 cm

    so

    i dunno figure it out. you basically just have to move the decimal

    right?

    i have no clue

    sense he moved it five to the left. presuming he is right

    the way im gonna remember it is you take the zeros from the 1000 and add them with the zeros from the 100 and move it that much to the left

    for those that arent idiots... the guy below me is

    cause theres a decimal at the end of every number

    i would be ashamed to send any kid to that cause he would only make you stupider

    its actually just to show people what scientific notation is you complete fool

    but thats all i can handle

    i dont argue with people that are so stupid it would make me look like a fool to even debate

    on the plus side. even though he is a rambling idiot somewhere within his stupid nonesense he did point out how its 10 ^ 0 instead of 1 which would just move the decimal point over one more and be completely useless

    im just gonna say what i think cause someone put its 10 to the power of five

    but its five decimal points if your converting

    10 to the power of five doesnt convert. it stays in km so thats wrong

    im thinking the teacher is right

  • 4 years ago

    800 mm = 0.8 m 50 cm = 0.5 m 2.6 km = 2600 m 7 km = 7000 m 250 mm = 0.25 m 35 km = 35000 m 400 mm = 0.4 m 300 cm = 3 m 1.8 km = 1800 m cheers ;)

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  • Anonymous
    10 years ago

    James doesn't need anyone to help him look like a fool. He's doing a great job all by himself.

    To convert from a lower unit to a higher unit you move the understood (LOL) decimal to the left. Move it two places for cm to m and three places for m to km. That's five places to move the decimal to the left.

    8 3 7 4 9 8. cm ---> 8.3 7 4 9 8 km

    ..<-----------

  • Anonymous
    10 years ago

    there are 100 cm per m

    there are 1000 m per km

    since a km is bigger than a cm, you would expect the number to be smaller when converted to km. so you divide instead of multiply.

    837498/100/1000

    =8.37498

    in scientific notation, that would be

    8.37498 * 10^1

  • AJ
    Lv 4
    10 years ago

    1 Km = 1000 m

    and

    1 m = 100 cm

    so 1 Km = 1000 x 100 => 100,000cm

    1 cm = 1/100,000km

    837498cm = 837498/100,000 km

    therefore

    837498cm = 8.37498 Km

    or you can write it as

    837498 x 10^-5 Km

    Source(s): QN!
  • 10 years ago

    Move the decimal point 5 places to the left, It's the easiest way I know there is a base ten that you can multiply to get there but this is how I Learned it

  • 10 years ago

    Well, since 1km=100,000cm, 837,498cm would be 8.37498km

  • Norrie
    Lv 7
    10 years ago

    (837,498cm / 100cm/m) / 1,000m/km = 8.37^3km.

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