To round 0.009999991 to two significant figures, you first identify the first two significant digits, which are 0.0099. Since the third significant digit is a 9, you round up, resulting in 0.010. Therefore, expressed with two significant figures, 0.009999991 rounds to 0.010.
two sig figs
45.0
2.0
0.0005482
143.4
1050 rounded to 2 sig figs is 1000, and to 1 sig figs is 1000.
1.26 is three sig figs and 6> 5, so you round up to 1.3 which is 2 sig figs
there are 3 sig figs. 4, 0, and 5 are the sig figs
When adding or subtracting, follow these steps to find a sig figs answer: 1) Add/Subtract numbers regularly. 2) Determine which measurement has the least decimal places. 3) Round final answer to the same number of decimal places. When multiplying or dividing, follow these: 1) Count the number of sig figs in the numbers you are multiplying/dividing. 2) Multiply/Divide regularly. 3) Round final answer to the same number of sig figs as the measurement with the fewest sig figs.
5 sig figs
There are four sig figs in 1.032
There are four sig figs in 2.905.