SCIENCE
PHYSICAL SCIENCES
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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2.92
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3
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2.924
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None of the above
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Detailed explanation-1: -In multiplication and division problems, your answer can have no more significant figures than the number with the fewest significant figures. There are three significant figures in 2.31 and three in 0.790. You must round to three significant figures and report the answer as 2.92.
Detailed explanation-2: -You simply include all the significant figures in the leading number. For example, the number 450 has two significant figures and would be written in scientific notation as 4.5 × 10 2, whereas 450.0 has four significant figures and would be written as 4.500 × 10 2.
Detailed explanation-3: -The significant figures of the final value is 2. Therefore, the answer of the given calculation is 0.024.
Detailed explanation-4: -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.