The Mass of the Earth S Oceans Is Only About $\frac { 1 } { 4400 }$

Multiple Choice

The mass of the Earth s oceans is only about $\frac { 1 } { 4400 }$ that of the Earth. If the mass of the Earth is $6.402 \times 10 ^ { 21 }$ tons, find the mass of the oceans.

A) $2.81688 \times 10 ^ { 22 }$ tons
B) $2.81688 \times 10 ^ { 21 }$ tons
C) $1.455 \times 10 ^ { 18 }$ tons
D) $1.455 \times 10 ^ { 19 }$ tons
E) $1.455 \times 10 ^ { 20 }$ tons