Question

question 3 (2 points)
round off the answer using significant figures (2.2222 x 10^3 mm)(2.00 x 10^3 mm) =
how many sf in the final answer?
2
3
4
5

Explanation:

Step1: Multiply the numbers

$(2.2222\times10^{3})\times(2.00\times 10^{3})=(2.2222\times2.00)\times10^{3 + 3}=4.4444\times10^{6}$

Step2: Determine significant - figures

When multiplying, the result should have the same number of significant figures as the number with the fewest significant figures in the values being multiplied. The number $2.00$ has 3 significant figures, while $2.2222$ has 5 significant figures. So the final answer should be rounded to 3 significant figures.

Answer:

B. 3