The measurement is $2 \frac { 15 } { 21 }$ yd. Find the precision and the greatest possible error of the measurement.
A) $\frac { 1 } { 21 }$ yd., $\frac { 1 } { 42 }$ yd.
B) $\frac { 1 } { 21 }$ yd., $\frac { 1 } { 21 }$ yd.
C) $\frac { 1 } { 42 }$ yd., $\frac { 1 } { 42 }$ yd.
D) $\frac { 1 } { 42 }$ yd., $\frac { 1 } { 21 }$ yd.
E) none of these

Question

Quizplus · Accepted Answer

The precision of a measurement is determined by the smallest unit to which it is measured, which in this case is $\frac{1}{21}$ yd. The greatest possible error is half of the precision, which is $\frac{1}{42}$ yd.

The Measurement Is 215212 \frac { 15 } { 21 }22115​

The Measurement Is $2 \frac { 15 } { 21 }$