What’s the expression in scientific notation? Explain how you got your answer

It’s b :)

(5.1x10^4) + (6.2x10^4)

would turn into

51000 + 62000

then you’d add them to get

113000

and to get it into scientific notation you’d do 11.3x10^4 because you need to move the decimal 4 times to get your original answer of 113000