How many ways can you purchase 2 cds if there are 3 to choose from, 4 cassettes if there are 4 to choose from, and 2 dvds if there are 5 to choose from?

60

50

40

30

Lola says these two expressions have the same value. expression a expression b which explains whether lola is correct?

What adds to be the bottom number but also multiplies to be the top number with 8 on the bottom and 15 on top

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.