Walt has 160 stamps. he has 3 times as many u. s stamps as international stamps. how many u. s stamps does he have? a. 40b. 80c. 100d. 120 explain to me how to do it. you.

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.