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Ksenya-84 [330]
4 years ago
13

How many significant digits are in 4.0×10^4

Mathematics
1 answer:
Katarina [22]4 years ago
3 0
There are two significant figures in 4.0x10^4. Since there's a decimal point before the zero, it counts as a sig fig. 
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Answer:

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Step-by-step explanation:

a = 1, b = 0 & c = -1;

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&

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Other possible answers;

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How could we do it on the calculator, much faster? The question says "in order," so we know it's a <em>permutation,</em> not a <em>combination.</em> This is the nPr button on the calculator (math -> prb -> 2). Just type in 12 nPr 3 and you get the same answer, 1320.

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