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37.753 rounded to one significant figure becomes 40
The first significant figure of 0.000169 is the 1 and it has 3 significant figures.
The number 10.00 has four significant figures. In a number, any non-zero digit is considered significant. Zeros between non-zero digits are also significant. Therefore, in this case, both the 1 and the 0 after the decimal point are considered significant figures.
2.5368 to 5 significant figure=2.5368
It is 200 rounded to one significant figure