Answer
(a), (c), and (d) have three significant figures.
Work Step by Step
a) 7.02: Three significant figures: 7, 0 and 2.
b) 6.452: Four significant figures: 6, 4, 5 and 2.
c) 6.02 x 1023: Three significant figures; 6, 0 and 2.
d) 302: Three significant figures: 3, 0 and 2.
e)12.77: Four significant figures, 1,2, 7 and 7.
The correct answer is (a), (c), (d).
