How many droplets of water are in a river that is 100 km long, 290 m wide, and 29 m deep? Assume a droplet is 1 milliliter. (Note: one liter = one cubic decimeter and 10 decimeters = l meter.)

A x 10^n droplets of water, where a = ? and n =? [Express you answer in scientific notation.]

Question

How many droplets of water are in a river that is 100 km long, 290 m wide, and 29 m deep? Assume a droplet is 1 milliliter. (Note: one liter = one cubic decimeter and 10 decimeters = l meter.)

A x 10^n  droplets of water, where a = ?   and      n =? [Express you answer in scientific notation.]

chaise · Answer

The volume of the river is: (overcourse this isn't exactly right as no river is perfectly rectangular)
Volume = width x height x length
Volume = 100, 100m x 290m x 29m
Volume = 29000029m^3

1 cubic metre = 1 000 000 millilitres

There are 29000029 cubic metres.
29000029 x 1 000 000 = 2.9000029x10^13

a = volume
n = amount of droplets. I think.

I hope this helped, and I hope it's right.