Use Scientific Notation to Perform the Following Operations $\left( 20 \times 10 ^ { 5 } \right) \div \left( 4 \times 10 ^ { 6 } \right)$

Multiple Choice

Use scientific notation to perform the following operations. Leave your answer in scientific notation.
- $\left( 20 \times 10 ^ { 5 } \right) \div \left( 4 \times 10 ^ { 6 } \right)$

A) $5.0 \times 10 ^ { 1 }$
B) $- 5.0 \times 10 ^ { 1 }$
C) $5.0 \times 10 ^ { - 1 }$
D) $- 5.0 \times 10 ^ { - 1 }$