Do the following calculation and express the answer using the correct number of significant figures.
______ = (1.21 *10^-3 + 1.3 *10^-3) * 6.453 *10²

Question

Do the following calculation and express the answer using the correct number of significant figures. ______ = (1.21 *10^-3 + 1.3 *10^-3)* 6.453 *10² A) 1.619 B) 2 C) 1.6 D) 1.62

Quizplus · Accepted Answer

The given numbers have 4 significant figures, so the answer should also have 4 significant figures.
Performing the given calculation and rounding off to 4 significant figures, we get
(1.21×10^-10 + 1.3×10^-10) × 6.453×10^12/10^12 = 1.619
Therefore, the best choice is C with 2 significant figures.

Do the Following Calculation and Express the Answer Using the Correct