calculate.\n(3×10^9)+(6×10^9)\nwrite your answer in scientific notation.

Explanation:

Step1: Factor out the common term (10^9)

[ \begin{align*} (3\times10^{9})+(6\times10^{9})&=(3 + 6)\times10^{9}\ \end{align*} ]

Step2: Calculate the sum of the coefficients

[ \begin{align*} (3 + 6)\times10^{9}&=9\times10^{9}\ \end{align*} ]

Answer:

(9\times10^{9})