Convert the Given Number to Scientific Notation $4.78 \times 10 ^ { - 2 }$

Multiple Choice

Convert the given number to scientific notation.
-478

A) $4.78 \times 10 ^ { - 2 }$
B) $4.78 \times 10 ^ { 2 }$
C) $4.78 \times 10 ^ { 3 }$
D) $4.78 \times 10 ^ { 1 }$