Solve the Problem $5 \times 10 ^ { 14 }$ Cubic Meters and the Volume of a Bacterium Is

Multiple Choice

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