1.
2.200
4 significant digits
Note that the two zeroes at the end need to be considered.
2.
0.3600
4 significant digits
Note that the zero before the decimal point need not be considered.
3.
7.002 x 10^4
4 significant digits
Note that we just need to pay attention to 7.002, and can put aside 10^4.
4.
1.130 x 10^-4
4 significant digits
Similar to question 3.

Answer #1| 23/12 2013 06:44