I don’t understand what I’m supposed to do. Someone pls help :’/

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

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!

What is the perimeter of a rectangular building that is 80 feet wide and 140 feet deep?