Identical sweaters are on sale in two different stores. the sale price in store a is 30% off the regular price of $25. the sale price in store b is 40% off the regular price of $30. at which store is the sweater a better buy? explain.

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.