21. Horseradish Sauces Sally has a recipe that calls for horseradish sauce that is 45% pure horseradish. At the grocery store she finds one horseradish sauce that is 30% pure horseradish and ranother that is 80% pure horseradish. How many tea- spoons of each of these horseradish sauces should Sally mix together to get 4 teaspoons of horseradish sauce that is 45% pure horseradish?