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Mathematics
OpenStudy (anonymous):

The population of the US is about 3.02 X 10^8, and the average American uses about 1.5x10^2 gallons of water per day. Could this lake supply the American population with water for 1 day?

OpenStudy (anonymous):

You need to supply the size of the lake in gallons.

OpenStudy (anonymous):

At the very least you can calculate the gallons used in a day: \[3.02*10^8*1.5*10^2=4.53*10^{10}\] Applying the correct SF: \[4.53*10^{10}\approx4.5*10^{10}\]

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