The number 150 has two significant figures. In the context of significant figures, the trailing zeros in a number are not considered significant if there is no decimal point. This means that in the number 150, the ‘1’ and ‘5’ are significant, while the ‘0’ is not. If the number were expressed as 150.0, it would then have four significant figures, as the decimal point indicates that the trailing zero is significant. Therefore, when evaluating significant figures, it’s important to consider the presence of decimal points, as they change the status of trailing zeros.
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