How many significant figures should be retained in the result of the following calculation?
12.00000 × 0.9893 + 13.00335 × 0.0107
A)2
B)3
C)4
D)5
E)6

Question

Quizplus · Accepted Answer

The first term can be rounded to 12. The second term can be rounded to 0.1396. Adding these gives 12.1396. The answer should have the same number of significant figures as the least precise term, which is the second term with 4 significant figures. Therefore, the answer should be rounded to 4 significant figures.

How Many Significant Figures Should Be Retained in the Result