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Calculator problem! watch

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    My sharp calculator isn't giving me the correct answers, I'm really worried because it will give me the wrong answers in my physics exam tomorrow!

    for example-
    99x2x10^9 = 1.98x10^9
    but my calculator gives 1.98 x 10^12
    HELP
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    (Original post by CresentHan)
    My sharp calculator isn't giving me the correct answers, I'm really worried because it will give me the wrong answers in my physics exam tomorrow!

    for example-
    99x2x10^9 = 1.98x10^9
    but my calculator gives 1.98 x 10^12
    HELP
    99 x 2 = 198

    198 x 10^9 isn't in standard form.

    You need to convert 198 into 1.98

    You do that by dividing by 10 twice.

    So then it becomes 1.98 x 10^11

    NOT 1.98 x 10^12
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    (Original post by Federerr)
    99x2 = 198

    198 x 10^9 isn't in standard form.

    You need to convert 198 into 1.98

    You do that by dividing by 10 twice.

    So then it becomes 1.98 x 10^11

    NOT 1.98 x 10^12
    The mark scheme answer is 1.98 x 10^9
    My calculator isn't giving me that answer
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    (Original post by CresentHan)
    The mark scheme answer is 1.98 x 10^9
    My calculator isn't giving me that answer
    Oh shoot sorry!

    to convert:

    198 x 10^11 into 1.98 x 10^9

    You divide 198 by 10 twice.

    So instead of adding to the power you take way.

    So not 1.98 x 10^12

    Its 1.98 x 10^9
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    (Original post by CresentHan)
    My sharp calculator isn't giving me the correct answers, I'm really worried because it will give me the wrong answers in my physics exam tomorrow!

    for example-
    99x2x10^9 = 1.98x10^9
    but my calculator gives 1.98 x 10^12
    HELP
    99x2x10^9=1.98 x 10^11 so I don't know what you're on about.....

    Sure you're using the right numbers?
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    (Original post by PharaohFromSpace)
    99x2x10^9=1.98 x 10^11 so I don't know what you're on about.....

    Sure you're using the right numbers?
    Yes! It's on the mark scheme, haha!
    I'm just as stuck as you! x
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    make sure it's on degrees mode and not radians or anything.
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    (Original post by Federerr)
    Oh shoot sorry!

    to convert:

    198 x 10^11 into 1.98 x 10^9

    You divide 198 by 10 twice.

    So instead of adding to the power you take way.

    So not 1.98 x 10^12

    Its 1.98 x 10^9
    That's okay, thank you!
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    (Original post by sulaimanali)
    make sure it's on degrees mode and not radians or anything.
    It's on degrees! x
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    (Original post by CresentHan)
    My sharp calculator isn't giving me the correct answers, I'm really worried because it will give me the wrong answers in my physics exam tomorrow!

    for example-
    99x2x10^9 = 1.98x10^9
    but my calculator gives 1.98 x 10^12
    HELP
    You need to clarify. 99 * 2 * 10^9 = 1.98 * 10^11. End of. The markscheme is wrong or you are reading it wrong.

    Post a picture of your calculator display and the markscheme.

    Try resetting the calculator by going into mode - clear or w/e it is in your calculator.
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    2x99=198

    198x10^9=1.98x10^11

    So you've given us the wrong numbers somewhere.
    • Thread Starter
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    Output power = 99% × 2 ×10^9= 1.98 × 10^9 (W)

    This is what the markscheme says
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    (Original post by CresentHan)
    Output power = 99% × 2 ×10^9= 1.98 × 10^9 (W)

    This is what the markscheme says
    Well, that's what you get for not putting it into context to begin with. 99% is not 99, 99% is equivalent to 0.99x. So 0.99 x 2 x 10^9 is 1.98x10^9.
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    Community Assistant
    Turn it on and off again
    Take battery out and put back in again
    Deffo check rad/deg mode is correct and that there are no odd modes on
    Spoiler:
    Show
    Then and only then resort to hitting it XD
    #lifehacks
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    There's nothing wrong with your calculator, Cresent! You should've told us it was 99% and not 99 at the start.

    99% is 99/100, which is 0.99; not 99.
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    (Original post by Drackore)
    There's nothing wrong with your calculator, Cresent! You should've told us it was 99% and not 99 at the start.

    99% is 99/100, which is 0.99; not 99.
    Sorry! Bit of a dim move haha! Thanks guys!
 
 
 
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