A medical researcher says that at least 20% of U. S. adults are smokers. In a random sample of 2000 U. S. adults, 18.5% say that they are smokers. At a = 0.05, test the claim.

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?

Each cookie sells for $0.50 sam spent $90 on baking supplies and each cookie cost $0.25 to make how many cookies does sam need to sell before making a profit formula: sales> cost

The weight v of an object on venus varies directly with its weight e on earth. a person weighing 120 lb on earth would weigh 106 lb on venus. how much would a person weighing 150 lb on earth weigh on venus?