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The number 4.0 × 10⁵ has ___ significant figures.

User Boggy
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Final answer:

The number 4.0 × 10⁵ has two significant figures: 4 and 0.

Step-by-step explanation:

Significant figures (also known as significant digits) are digits in a numerical value that carry meaningful information about the precision of the measurement. They include all certain digits and the first uncertain digit.

The number 4.0 × 10⁵ has two significant figures.

In scientific notation, all significant figures are listed explicitly. In this case, the number 4.0 × 10⁵ has two significant figures: 4 and 0.

User Ober
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