SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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1.31
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1.41
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1.51
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None of the above
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Detailed explanation-1: -We round a number to three significant figures in the same way that we would round to three decimal places. We count from the first non-zero digit for three digits. We then round the last digit. We fill in any remaining places to the right of the decimal point with zeros.
Detailed explanation-2: -What are significant figures? Significant figures are the digits in a number that contribute to the accuracy of it. We start counting significant figures at the first non-zero digit of a number which is called the first significant figure, the next digit is then called the second significant figure and so on.
Detailed explanation-3: -However, both 10 and 1000 have only 1 sig fig. The reason is because the zeros have to be there to show what the number is, so they don’t count as significant digits. What about 1001? It has 4 sig figs.