Every day, a random sample of 275 computer memory chips produced by a factory is tested to see if the chips meet their minimum speed ratings for certain operations. if 2 of the chips failed the test on a day when 20,500 chips were made, which is the best estimate of the number of memory chips made that day that are likely to meet the minimum speed ratings for those operations?

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.