Question

How many significant figures does the rounded ans 101 cm - 99.1 cm = 1.9 cm (unrounded) After rounding, the answer should be reported to the and thus has 0.5 atm + 9.8 atm = 10.3 atm (unrounded) After rounding, the answer should be reported to the and thus has

Answer 1

Step-by-step explanation:

Rules for counting significant figures:

1. Digits from 1 to 9 are always significant and have infinite number of significant figures.
2. All zero’s preceding the first integers are never significant. For example: 0.0078 has two significant figures.
3. All zero’s after the decimal point are always significant. For example: 4.500, 45.00 and 450.0 all have four significant figures.
4. All zero’s between integers are always significant. For example: 5005, 5.005 and 50.05 all have four significant figures.

1) 101 cm - 99.1 cm = 1.9 cm ≈ 2.0 cm

1.9 cm ≈ 2.0 cm

There are two significant figures that is 2 and 0.

2) 0.5 atm + 9.8 atm = 10.3 atm ≈ 10.0 atm

There are three significant figures that is 3 , 0 and 0.