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Well, that depends on exactly why you can't obtain an exact number.
But the short answer is that you use the most accurate figures you have to input into your formula and obtain an APPROXIMATION. This is what you would do if you need to use the resulting answer in the "real world".
But if you are attempting to get an answer for a problem in a "pure" math course (or similar situation), then you can often just submit an answer that includes a SYMBOL in place of the number that cannot be exactly known.
For example, let's say that you want to know the area of a circle with a radius of 2 feet.
The formula uses the number Pi, which cannot be exactly known because its digits continue infinitely without repeating. But mathematicians consider the symbol to represent the EXACT number, even though it can't be known.
If you need a "real world" answer, then you'd just use an approximation of Pi (3.1415926535897932384626 ought to be more than enough digits for just about all purposes except perhaps navigating to Mars!)
So your answer would be something like 2^2*Pi = 4*Pi ~= 12.56636
(I used ~= to indicate an approximation)
For a pure math class, most instructors will accept (and perhaps demand) that you submit an answer where you just leave in the symbol for Pi. Thus your final answer would be . . .
4*Pi
And 4*Pi is considered to be an exact answer.
Hope that answered your question.
What else can I help you with?
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Step 1. Obtain a court order.
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The exact number can nonly be found if YOU obtain a good concordance and count the references
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Scientists must sometimes rely on estimates when they cannot obtain exact numbers :)
How do you spell exact?
That is the correct spelling of "exact" (precise, accurate).
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an exact decimal must be with the number 0. in it or it is not exact.
If scientists cannot obtain exact numbers they should rely on a?
answer
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how do i obtain a secondary credit number
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an approximation.
When scientists cannot obtain on exact numbers they often rely on?
estimate
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Although an exact number would be very difficult to obtain, there are most likely millions of Americans who participate in illegal file sharing.
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This is not something that you can get an exact number for.
What is an exact number in math?
A number
