Jim is his dad cook hamburgers for his family and friends. there are 15 people. each person wants two hamburgers. three people want hamburgers with cheese. two people want hamburgers with mustard. two people want hamburgers with catsup. the rest want them plain. how many plain hamburgers will jim and his dad make? a: 8 b: 16 c: 21 d: 23

The highest point in the united is mount mckinley, also called denali, in alaska. its summit is 20,335 feet above sea level. badwater, a basin located in death valley, is the lowest point in the united states at 282 feet below sea level. how high is the summit of denail above the death valley location? show your calculation using absolute value symbols.