Julie wants to make 800g of a 15% alcohol solution by mixing 20% solution and a 4% solution. how many grams of each kind does she need? if a 20% and a 4% alcohol solution weigh x g and y g respectively

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?

Three times the sum of a number and seven is negative thirty-six. what is the number?

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics