Substract. What is the difference?

Answer:
5 x [tex]10^1^0[/tex]
Step-by-step explanation:
both (9 x [tex]10^1^0[/tex]) and (4 x [tex]10^1^0[/tex]) have the same [tex]10^1^0[/tex]. all you really need to do is subtract 9 - 4, and the exponent will be the same
9 - 4 = 5
the answer is 5 x [tex]10^1^0[/tex]