Answer :
Answer:
D. 2.048 x 10¹³
Explanation:
Given the expression:
[tex]\mleft(6.4\times10^9\mright)(3.2\times10^3)[/tex]We can rewrite the expression as:
[tex]=6.4\times10^9\times3.2\times10^3[/tex]Next, we rearrange by bringing the powers of 10 together.
[tex]\begin{gathered} =6.4\times3.2\times10^3\times10^9 \\ =20.48\times10^{3+9} \\ =2.048\times10^1\times10^{12} \\ =2.048\times10^{1+12} \\ =2.048\times10^{13} \end{gathered}[/tex]The correct choice is D.