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When multiplying 3.24 by 2.1, what is the correct number of significant figures

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Question: When multiplying 3.24 by 2.1, what is the correct number of significant figures in the final answer?

Options:

  1. 4
  2. 3
  3. 2
  4. 1

Correct Answer: 3

Solution: 

In multiplication, the result should have the same number of significant figures as the factor with the least significant figures. 3.24 has 3 significant figures and 2.1 has 2 significant figures, so the answer should have 2 significant figures.

When multiplying 3.24 by 2.1, what is the correct number of significant figures

Practice Questions

Q1
When multiplying 3.24 by 2.1, what is the correct number of significant figures in the final answer?
  1. 4
  2. 3
  3. 2
  4. 1

Questions & Step-by-Step Solutions

When multiplying 3.24 by 2.1, what is the correct number of significant figures in the final answer?
  • Step 1: Identify the numbers you are multiplying: 3.24 and 2.1.
  • Step 2: Count the significant figures in each number.
  • Step 3: For 3.24, there are 3 significant figures (3, 2, and 4).
  • Step 4: For 2.1, there are 2 significant figures (2 and 1).
  • Step 5: Determine which number has the least significant figures. Here, 2.1 has the least with 2 significant figures.
  • Step 6: When you multiply the two numbers, your final answer should have the same number of significant figures as the number with the least significant figures.
  • Step 7: Therefore, the final answer should have 2 significant figures.
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