Question

There are approximately 1.2×10 to the eighth household in the US if the average household uses 400 gallons of water each day what is the total number of gallons of water used by households in the US each day

Answer 1

`Total = 4.8 * 10^(10)`

Explanation:

Given

`h = 1.2 * 10^8` --- households

`g = 400` --- gallons

Required

The number of households

To do this, we simply multiply the average households by the gallons.

`Total = g* h`

`Total = 400 * 1.2 * 10^8`

`Total = 480 * 10^8`

Rewrite as:

`Total = 4.8 * 10^2 * 10^8`

`Total = 4.8 * 10^(10)`