Question

Add the following numbers, using scientific notation and the correct amount of significant digits. 3.4⋅10 8m + 4.56⋅10 9m = _____.

A 4.9 ⋅10 9m
B 4.9 ⋅10 8m
C 7.96 ⋅10 9m
D 7.96 ⋅10 8m

Answer 1

The answer is B
B 4.9 ⋅10 8m

Answer 2

The answer is A) 4.9 × 10^9

Step-by-step explanation:

I literally just did the calculation, the other dude is wrong.