Question 77082
Let x=amount of freshwater on earth

Lets first look at a more simple version of the problem:

If there are 10 people on Earth and there is enough freshwater to provide each person with 2 L, how much freshwater is on the Earth?


Our equation to solve is the amount of water per person times the number of people=the amount of fresh water on earth:

{{{(6*10^9)(8.79*10^5)=x}}}  remember,when you multiply exponents you add them

{{{((6)(8.79))*10^14=x}}}
{{{52.74*10^14=x}}} or
{{{5.274*10^15=x}}}-----------------------# of liters of fresh water on earth


Hope this helps------ptaylor