Question

Multiply(7 x 10^3)(4 x 10^5)Type your answer in scientific notation.

Answer 1

Answer:

$2.8\times10^9$

Explanation:

To evaluate the expression:

$\mleft(7\times10^3\mright)\mleft(4\times10^5\mright)$

First, we remove the bracket as shown below:

$=7\times10^3\times4\times10^5$

Next, we rearrange to bring the powers of 10 together:

$\begin{gathered} =7\times4\times10^3\times10^5 \\ =28\times10^{3+5} \\ =28\times10^8 \\ =2.8\times10^9 \end{gathered}$