In each of our taping examples, we stated the measurement to the smallest marked division on the tape and then interpolated the next digit. For example, we reported 9.83 ft with a tape divided to tenths, Figure B-1:
| Figure B-1
When we report a measurement, we’re conveying its magnitude (size) and resolution (which can imply accuracy). We do this using significant figures (sig fig). The number of sig fig in a number is all the digits of which we’re certain plus an additional estimated digit. Our 9.83 ft distance has three sig fig.
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