Keeping in mind the rules for significant digits, what is the product of 0.4725 m and 2.72 m? 1. 1.29 m2 2. 1.28520 m2 3. 1.3 m2 4. 1 m2 5. 1.2852 m2

The table below shows the approximate masses of a dust particle and a grain of pollen. dust particle 0.000000778 g grain of pollen 0.00000000155 g the mass of a dust particle can be estimated and written in the form a × 10^b, where a = 8 and b = the mass of a grain of pollen can be estimated and written in the form a × 10^b, where a = 2 and b = based on the estimates, the mass of a dust particle is approximately blank times larger than the mass of a grain of pollen.