Errors and Tolerance

(a) $\displaystyle 5$ mm
(b) $\displaystyle \frac{5}{250} = 0.02 = 2\%$

Maximum $\displaystyle 4.7$ kg
Minimum $\displaystyle 4.3$ kg

$\displaystyle 18.3 \times 12.2 = 223.26$ m$\displaystyle ^2$

$\displaystyle 17.7 \times 11.8 = 208.86$ m$\displaystyle ^2$

Maximum speed uses the maximum distance and the minimum time.
$\displaystyle \frac{9.4}{29} = 0.324$ km/minute

(a) $\displaystyle 47.9 - 47.6 = 0.3$ g
(b) $\displaystyle \frac{0.3}{47.6} = 0.0063... = 0.6\%$

$\displaystyle 30.5^2 = 930.25$ cm$\displaystyle ^2$

The parts from Machine A are more precise: their measurements are tightly grouped, with a range of only $\displaystyle 0.1$ mm.
The parts from Machine B are more accurate: their measurements average $\displaystyle 60.0$ mm, which is the target, while the measurements from Machine A average $\displaystyle 60.43$ mm, which is always too large.