Rewrite the Number or Expression as Requested $2.81 \cdot 10 ^ { - 5 }$

Multiple Choice

Rewrite the number or expression as requested.
-0.000281 (Rewrite in scientific notation.)

A) $2.81 \cdot 10 ^ { - 5 }$
B) $2.81 \cdot 10 ^ { 4 }$
C) $2.81 \cdot 10 ^ { - 3 }$
D) $2.81 \cdot 10 ^ { - 4 }$