Precision and Accuracy

1. $\text{Precision}$ $\text{is}$ $\text{the}$ $\text{size}$ $\text{of}$ $\text{the}$ $\text{smallest}$ $\text{unit}$ $\text{a}$ $\text{measurement}$ $\text{shows.}$
2. $20.941$ $\text{km}$ $\text{is}$ $\text{given}$ $\text{to}$ $\text{the}$ $\text{nearest}$ $\text{thousandth,}$ $\text{the}$ $\text{smallest}$ $\text{unit}$ $\text{here.}$

Answer: $20.941$ $\text{km}$

1. $\text{The}$ $\text{greatest}$ $\text{possible}$ $\text{error}$ $\text{is}$ $\text{half}$ $\text{of}$ $\text{the}$ $\text{unit:}$ $0.005$ $\text{meters.}$
2. $1.93\pm 0.005:1.925$ $\text{to}$ $1.935$ $\text{meters.}$

Answer: $\text{from}$ $1.925$ $\text{to}$ $1.935$ $\text{meters}$

1. $\text{Leading}$ $\text{zeros}$ $\text{never}$ $\text{count;}$ $\text{end}$ $\text{zeros}$ $\text{after}$ $\text{a}$ $\text{decimal}$ $\text{point}$ $\text{do;}$ $\text{zeros}$ $\text{between}$ $\text{digits}$ $\text{do.}$
2. $50.08$ $\text{has}$ $4.$

Answer: $4$