Find the percent error of the measurement 7 cm.

Question

anonymous · Answer

what is the other measurement? we need 2 measurments to do 'percent error'

anonymous · Answer

There is no other Measurement. "Find the percent error of the measurement 7 cm." thats how it is exacley asked. ive been trying to figure it out for so long. & i cant with no other measurement.

anonymous · Answer

If there is no other measurment, then the answer would be, "the percent error can't be calculated with out another reference measurment"

anonymous · Answer

Thats what i had thought. But check it out, these are the answer's given, 4.17%, 0.17%, 1% and, 0.42% which to me does not make sence.

anonymous · Answer

ok ok, so there has to be another number somewhere, 
is it possible it is from a question before?

anonymous · Answer

No the question before talks about area.

anonymous · Answer

Its so confusing!

anonymous · Answer

You measure a piece of rope and find its length to be 12 m. Find the percent error of this measurement. Round to the nearest hundredth.

anonymous · Answer

theres another question with only ONE measurement,

anonymous · Answer

shoot... idk what to do!

anonymous · Answer

Yeah me neither. Thank you for trying!

anonymous · Answer

$$PercentError = \frac{ NewMeasurment - OriginalMeasument }{ OriginalMeasurment}*100$$

anonymous · Answer

Nope, my best bet is to guess.

anonymous · Answer

I hate problems like this.
I once took an exam, and did the problem 3 ways!