Rewrite the Number or Expression as Requested $\left( 16 \cdot 10 ^ { 9 } \right) \div \left( 4 \cdot 10 ^ { 4 } \right)$

Multiple Choice

Rewrite the number or expression as requested.
-Rewrite the number or expression as requested.
$\left( 16 \cdot 10 ^ { 9 } \right) \div \left( 4 \cdot 10 ^ { 4 } \right)$ (Write the result in scientific notation.)

A) $4 \cdot 10 ^ { 5 }$
B) $8 \cdot 10^{13}$
C) $4 \cdot 10 ^ { 13 }$
D) $8 \cdot 10 ^ { 5 }$