Question

calculate.
(7×10^8)+(2×10^8)
write your answer in scientific notation.

Explanation:

Step1: Factor out $10^{8}$

$(7\times 10^{8})+(2\times 10^{8})=(7 + 2)\times10^{8}$

Step2: Calculate the sum inside the parentheses

$7+2 = 9$
So the result is $9\times10^{8}$

Answer:

$9\times10^{8}$