Question

What is the sum of 4.9 × 102 and 6.8 × 103?

( one answer )

Answer 1

4.9 × 10^2 + 6.8 × 10^3
= 10^2(4.9 + 68)
= 72.9 x 10^2
= 7.29 x 10^3

answer
7.29 x 10^3

Answer 2

Answer:the answer is 7290

Explanation:

From the given expression

4.9*10^2 =4.9*100=490

and

6.8*10^3=6.8*1000=6800

490+6800=7290