1.50 x 10^3
There are 2 significant figures in this measurement.
2
It is 1500.
The number of significant figures in a measurement can be clarified by using scientific notation, which explicitly indicates the precision of the number. For example, writing 1.23 x 10^3 clearly shows three significant figures. Additionally, using decimal points or trailing zeros can also help; for instance, writing 1500 with a decimal point (1500.) indicates four significant figures, while 1500 without a point might imply only two. Lastly, employing parentheses or overlines can also denote specific significant figures in certain contexts.
A measurement expressed to three significant figures includes three digits that contribute to its precision, which may include leading zeros but excludes trailing zeros unless they are after a decimal point. For example, the number 0.00456 would be expressed as 4.56 × 10^-3 in three significant figures. Similarly, a measurement like 1500 could be expressed as 1.50 × 10^3 if it is intended to be three significant figures.
Two. Although there is no way to be sure that the number is not accurate to the unit's digit.
A zero is considered significant when it contributes to the precision of a measurement. This includes zeros that appear between non-zero digits (e.g., 105 has three significant figures) and trailing zeros in a decimal number (e.g., 2.300 has four significant figures). However, trailing zeros in a whole number without a decimal point (e.g., 1500) are not considered significant unless specified by a bar over the last significant digit or expressed in scientific notation.
Expressed in figures, 1500 million is equal to 1,500,000,000.
1500,00,00,0001500,00,00,0001500,00,00,0001500,00,00,000
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The only reliable way to report the correct significant digits in a measurement with trailing zeros is to use scientific notation. This format clearly indicates the number of significant figures by expressing the measurement as a product of a number between 1 and 10 and a power of ten. For example, 1500 can be represented as 1.5 x 10^3 (two significant figures) or 1.500 x 10^3 (four significant figures), eliminating ambiguity about the significance of the trailing zeros.
3% of 1500 = 0.03 x 1500 =45