Solve the problem. Express the answer in scientific notation to two decimals unless requested otherwise.
-Assume that the volume of the earth is $5 \times 10 ^ { 14 }$ cubic meters and the volume of a bacterium is $2.5 \times 10 ^ { - 16 }$ cubic meters. If the earth could be filled with bacteria, how many would it contain?
A) $5.0 \times 10 ^ { 31 }$ bacteria
B) $2.0 \times 10 ^ { - 30 }$ bacteria
C) $2.0 \times 10 ^ { 30 }$ bacteria
D) $5.0 \times 10 ^ { - 31 }$ bacteria

Question

Quizplus · Accepted Answer

To find the number of bacteria that can fit in the earth, divide the volume of the earth by the volume of a bacterium: $(5 \times 10^{14}) / (2.5 \times 10^{-16}) = 2.0 \times 10^{30}$ bacteria.

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