Perform the Indicated Operation $\left( 5 \times 10 ^ { 8 } \right) \left( 4.3 \times 10 ^ { 8 } \right)$

Multiple Choice

Perform the indicated operation. Write the answer in scientific notation.
- $\left( 5 \times 10 ^ { 8 } \right) \left( 4.3 \times 10 ^ { 8 } \right)$

A) 2.15 x 10⁶⁴
B) 215 x 10¹⁶
C) 21.5 x 10¹⁷
D) 2.15 x 10¹⁷