Perform the Indicated Operations (Write Each Result in Scientific Notation

Essay

Perform the indicated operations (write each result in scientific notation with the decimal part rounded to three significant digits when necessary). $\frac { \left( 4 \times 10 ^ { - 2 } \right) \left( 6 \times 10 ^ { - 9 } \right) } { \left( 3 \times 10 ^ { - 4 } \right) \left( 8 \times 10 ^ { 5 } \right) } =$$\underline { \quad\quad\quad\quad }$ × $\times 10$$\underline { \quad\quad\quad\quad }$