Mary Ann F. answered 12/07/14
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Math & Science... Algebra and Geometry specialist
15 uL into 75uL is a 1:5 ratio, but the concentration is one part out of a total of 6 (because the final volume is 90uL). So the final concentration needs to be multiplied by 6. The result is 75 x 6 or 450 mg/dL.....
Make sense?