A sweater was discounted by 36%. The amount if the discount was $27. What was the cost of the sweater?

Me because some of question i don’t understand

Christina can paint 420 square feet in 105 minutes. which unit rate describes the scenario?

Milk and ice cream are mixed together for a recipe. the total volume of the mixture is 1 cup. if the milk contains 2% fat, the cream contains 18% fat ,and the mixture contains 6% fat ,how much cream is in the mixture