Figure 1 Provided this balance has been zeroed correctly, you can be confident that its reading of mass of 128.93 g is accurate
The written examinations you will take at the end of your biology course will test your mathematical skills. At least 10% of the overall marks must involve the use of mathematical skills, set in a biological context. Two of these skills are:
■ identifying uncertainties in measurements and using simple techniques to determine uncertainty when data are combined
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