a study of parents of kindergarteners included 349 who were chosen at random. of these parents, 47% said they sent their child to pre kindergarten. school records show that only 31% of parents sent their children to pre-kindergarten. identify the statistic and the parameter.

Your vet has placed your pet on a diet. the diet is to contain at least 12 mg of fat and at least 14 mg of protein per serving. these requirements are to be obtained from two food sources. source a contains 2 mg of fat and 2 mg of protein per serving. source b contains 1 mg of fat and 3 mg of protein per serving. if source a sells for $1.28 per serving and source b sells for $1.12 per serving, how many servings of each type should be purchased to satisfy the requirements at minimal cost?