Cliffs AP Chemistry, 3rd Edition

14. Which of the following would have an answer with three significant figures?

A. 103.1 + 0.0024 + 0.16

B. (3.0 × 104 )(5.022 × 10 –3) / (6.112 × 102 )

C. (4.3 × 105 ) / (4.225 + 56.0003 −0.8700)

D. (1.43 × 103 + 3.1 × 101 ) / (4.11 × 10 –6)

E. (1.41 × 102 + 1.012 × 104 ) / (3.2 ×l0–1)

Answer: D

(1.43 × 103 + 3.1 × 101 ) = 14.3 × 102 + 0.31 × 102 = 14.6 × 102

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