Question: What is the correct way to express 0.000123 in scientific notation with significant figures?
Options:
1.23 x 10^-4
1.23 x 10^-3
1.2 x 10^-4
1.23 x 10^-5
Correct Answer: 1.23 x 10^-4
Solution:
In scientific notation, 0.000123 is expressed as 1.23 x 10^-4, maintaining 3 significant figures.
What is the correct way to express 0.000123 in scientific notation with signific
Practice Questions
Q1
What is the correct way to express 0.000123 in scientific notation with significant figures?
1.23 x 10^-4
1.23 x 10^-3
1.2 x 10^-4
1.23 x 10^-5
Questions & Step-by-Step Solutions
What is the correct way to express 0.000123 in scientific notation with significant figures?
Step 1: Identify the number you want to convert, which is 0.000123.
Step 2: Move the decimal point to the right until you have a number between 1 and 10. For 0.000123, move the decimal 4 places to the right to get 1.23.
Step 3: Count how many places you moved the decimal. In this case, you moved it 4 places.
Step 4: Since you moved the decimal to the right, you will use a negative exponent. So, write it as 1.23 x 10^-4.
Step 5: Check the significant figures. The number 0.000123 has 3 significant figures (1, 2, and 3).
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