Joe will build a rectangular pen for his dog. a wall will form one side of the pen. joe has 40 ft of fencing to form the other three sides. joe plans to build the pen so that it has its maximum possible area. what will be the dimensions of joe’s dog pen?

An energy drink company claims that its product increases students' memory levels. to support its claims, the company issues advertisements claiming that 8 out of 10 people (chosen randomly from across the country) who tried their product reported improved memory. the missing component in this study is a .