It is: 0.0024
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To one sig fig, 300 To two sig figs, 310 To three sig figs, 314
two sig figs
To take a number to two significant figures, you first take the greatest non-zero digit, and the one after it. In this case we'd have 1.0 Next you look at the third digit to see if the second digit should be rounded up, in this case the third digit is 0 so we don't round up. Thus the answer is 1.0, or written simply, 1
It is 1000 L, but in that from it is not possible to tell whether the number is rounded to one sig digs or four. Two ways to make the rounding explicit are to write it as1.0*10^3 L, or1.0 kL.
0.156 rounded to two decimal places is 0.16.