Perform each of the following calculations, and give an answer with the correct number of significant figures:
a. 45.7 × 0.034

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Step 1: Identify the numbers involved in the calculation: 45.7 and 0.034.

Step 2: Determine the number of significant figures in each number. 45.7 has 3 significant figures, and 0.034 has 2 significant figures.

Step 3: Perform the multiplication operation: \( 45.7 \times 0.034 \).

Step 4: After performing the multiplication, round the result to the smallest number of significant figures from the numbers involved in the calculation. In this case, the result should be rounded to 2 significant figures.

Step 5: Ensure the final answer is expressed in the correct number of significant figures and includes appropriate units if applicable.

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Significant Figures

Significant figures are the digits in a number that contribute to its precision. This includes all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal portion. Understanding significant figures is crucial for accurately reporting measurements and calculations in scientific contexts.

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01:09

Significant Figures (Simplified) Example 2

Multiplication of Significant Figures

When multiplying numbers, the result should be reported with the same number of significant figures as the factor with the least significant figures. This rule ensures that the precision of the result reflects the least precise measurement involved in the calculation, maintaining the integrity of the data.

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03:11

Significant Figures Calculations Concept 1

Scientific Notation

Scientific notation is a way of expressing numbers that are too large or too small to be conveniently written in decimal form. It involves writing a number as a product of a coefficient (between 1 and 10) and a power of ten. This notation is particularly useful in scientific calculations to simplify the handling of significant figures and to clearly convey the scale of the numbers involved.

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