Answer
See the explanation
Work Step by Step
The list in order of increasing precision, with uncertain quantities in parentheses, is:
(e) 2000 mg (1 s.f.)
(a) 1400 km (2 s.f.)
(c) 0.00304 g (3 s.f.)
(b) 1516 kg (4 s.f.)
(d) 125.34 cm (5 s.f.)
The uncertain quantities are:
• In (e) 2000 mg, (1 significant figure) the precision of the measurement is not specified. It could be uncertain by a few milligrams or more.
• In (a) 1400 km, 1 and 4 are significant, zeros are ambiguous
