Answer:
8 * 10⁹
Step-by-step explanation:
(2 * 10⁶ ) * (4 *10³) = 2*4 * 10⁶ * 10³
= 8 * 10⁽⁶⁺³⁾
= 8 * 10⁹
Hint: [tex]a^{m}*a^{n} = a^{m+n}[/tex]
