If fx) and f^-1(x) and inverse functions of each other and f(x) =2x+5, what is f^-1(8)? O -1
O 3/2
O 41/8
O 23

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 .