Hey there!
The answer would most likely be: [tex]3 [/tex] × [tex]10^2[/tex]
Because, [tex]10^2 = 100 [/tex] and the problem becomes: [tex]3 [/tex] × [tex]100 [/tex] ← that gives you [tex]300 [/tex]
Good luck on your assignment and enjoy your day!
~[tex]MeIsKaitlyn:)[/tex]