Photocopy of a polygon was reduced to 25% of its original size. Then, the copy was again reduced to 25% of its size. a. Is the second photocopy similar to the original?
b. What is the ratio of the corresponding sides of the second photocopy to the original?

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.