Question

Evaluate the expression. Write your answer in scientific notation.

$(4.6\times {10}^9)+(3.9\times {10}^9)$

Answer 1

Evaluate the expression:

$$\begin{gathered} 4.6\times {10}^9+3.9\times {10}^9=(4.6+3.9)\times {10}^9 \\ =8.5\times {10}^9 \end{gathered}$$

Hence, $(4.6\times {10}^9)+(3.9\times {10}^9)$ is $8.5\times {10}^9$.