Answer
(b) and (c)
Work Step by Step
a.0.0592: Three significant figures: 5, 9 and 2.
b.0.08206: Four significant figures: 8, 2, 0 and 6.
c.8.314: Four significant figures; 8, 3, 1 and 4.
d. 5420: Three or four significant figures, depending on context (without a decimal point, it's ambiguous)
e. 5.4 x 10^3: Two significant figures: 5 and 4.
The correct answer is (b) and (c).