Answer
(d)
Work Step by Step
We’re asked about uncertain values, so the significant figures come from the measured quantities (the denominators), not from the calculated reciprocals.
a. 1/545 has 3 significant figures (5,4, 5).
b. 1/6.4 x 10-3 has 2 significant figures (6 and 4).
c. 1/6.50 has 3 significant figures (6, 5, 0).
d.1/1.346 x 10^2 has 4 significant figures (1,3 4, 6).
The correct number is (d).
