Question

calculate the answer and report the correct number of significant figures. 0.02 cm × 2.271 cm answer: a 0.04742 cm² b 0.047 cm² c 0.04 cm² d 0.0474 cm² e 0.05 cm²

Explanation:

Step1: Multiply the numbers

$0.02\times2.271 = 0.04542$

Step2: Determine significant - figures

0.02 has 1 significant figure. In multiplication, the result should have the same number of significant figures as the number with the fewest significant figures among the values being multiplied. So, 0.04542 should be rounded to 1 significant figure.

Step3: Round the result

Rounding 0.04542 to 1 significant figure gives 0.05.

Answer:

E. 0.05 cm²