Pls help If you help me I will thank you pls I’m New I need help pls Merry Christmas

Can someone me and plz do the problem

Determine which expressions represent real numbers and which expressions represent complex number. asaaap! plis!

Each cookie sells for $0.50 sam spent $90 on baking supplies and each cookie cost $0.25 to make how many cookies does sam need to sell before making a profit formula: sales> cost