The Standard deviation of a sample of 100 observations equals 64. The Variance of the sample equals

As manager of kids skids, meghan wants to develop her relationship management skills. in order to do this, she learns how to

Oz makes lion food out of giraffe and gazelle meat. giraffe meat has 18 grams of protein and 36 grams of fat per pound, while gazelle meat has 36 grams of protein and 18 grams of fat per pound. a batch of lion food must contain at least "46,800" grams of protein and 70,200 grams of fat. giraffe meat costs $1/pound and gazelle meat costs $2/pound. how many pounds of each should go into each batch of lion food in order to minimize costs? hint [see example 2.]

How do you know if two line segments are perpendicular?