How do you write 3.4 in expanded form

Neveah and clint are baking muffins for the bake sale. they need to bake 30 muffins for their display case. clint has baked 4 so far, and neveah has baked 7. how many muffins (m) do they have left to bake? show your work!

In which direction does the left side of the graph of this function point? f(x) = 3x3 - x2 + 4x - 2

Which will form a composite function?