Although, here are no expressions ! it's an incomplete question. So, showing the answer with general simplification [tex]17.82(10^{31})[/tex].
Step-by-step explanation:
We have the expression as (5.4x10^10) (3.3x10^21) which can be further simplified as :
⇒(5.4x10^10) (3.3x10^21)
⇒[tex](5.4(10^{10})(3.3(10^{21})[/tex]
keep the power terms together and numbers to simply. Hence, we get as below
⇒ [tex](5.4(3.3))(10^{21}.10^{10})[/tex]
⇒[tex](17.82)(10^{21+10)})[/tex]
By solving the above, we get final simplified answer as
⇒[tex]17.82(10^{31})[/tex]
Although, here are no expressions ! it's an incomplete question . You may match [tex]17.82(10^{31})[/tex] to the listed options wherever!