Anonymous
Anonymous asked in Science & MathematicsMathematics · 6 months ago

Please help, what is the exact number before 8 inches?

I know that there is 7 then 7 and a half but what is after that and after that just before 8? Please help

14 Answers

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  • 6 months ago

    What Jim Moor said.

  • 6 months ago

    There is no exact number before 8 inches since the numbers are continuous, but I think you are asking what is the exact value of the *marking* just before 8 inches.

    Obviously that depends on the markings on your ruler.

    Some rulers might only be marked to the nearest 1/4 inch. So the mark before would be 7 3/4.

    Others might be marked to the nearest 1/8 inch. So the mark before would be 7 7/8.

    If it's the nearest 1/16 inch, then the value before is 7 15/16.

    And if it's to the nearest 1/32 inch, then the value before is 7 31/32.

    For all practical purposes, that's usually the smallest unit (though you can see it could continue on to 7 63/64, 7 127/128, etc.)

    Basically take 8 inches and subtract one unit of marking on the ruler. For example, on a ruler with 1/32 markings:

    8 - 1/32

    = 7 31/32

    Attachment image
    • Puzzling
      Lv 7
      6 months agoReport

      7.99999999 is not 8. But 7.99999999... (repeating) is 8. So the answer is an infinite number of 9s.

  • Anonymous
    6 months ago

    Not sure if there is one

  • 6 months ago

    Whatever number you choose, I will choose something closer. There isn't one until you define the unit of measurement scale. There is a limit to how small you can tell and that is what defines the next number down from your target. It is one unit less.

    What unit of measurement are you dealing with? That is what decides, the measuring device declares how small you can measure. Rulers tend to use 16ths or 32nds as the smallest split possible, although kiddie rulers are often only divided into 8ths.

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  • Como
    Lv 7
    6 months ago

    --

    7¾ could be such a number.

  • geezer
    Lv 7
    6 months ago

    7.9999999999999999999999999999999999999999999999999999.. inches

    @ your comment Puzzling

    No .. it's not EXACTLY EQUAL .. 8 is 8 .. 7.999whatever isn't.

    Notice how one starts with an 8 and the other one doesn't ?

    If 7.9 isn't 8 and 7.9999999etc is 8 .. How many .9's does it take ?

    • Puzzling
      Lv 7
      6 months agoReport

      It's the same reason that 0.9999... is exactly equal to 1. It's not *almost* 1 – it's just a different way of representing the same value.
      https://en.m.wikipedia.org/wiki/0.999...

  • 6 months ago

    7.99999999999999999999999999999999999999999999999999999999999999999999999999999999999999999 to infinity.

    • Puzzling
      Lv 7
      6 months agoReport

      And 0.999... equals 1. What is your point? If 7.999... is different than 8, what's a number between them?

  • 6 months ago

    7 is the whole counting number (integer) before 8.

    There are infinite values (Real Numbers) between 7 & 8

  • 6 months ago

    The set of "real numbers" between 7 and 8 is infinite, and for any such number you may choose, there is another that is greater than that but still less than 8.

  • ted s
    Lv 7
    6 months ago

    define " exact number " ....there is no number immediately before 8

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