invests $5,000 in a simple interest account for 5 years. What interest rate must the account pay so there is $6,000 in the account at the end of 5 years?

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 .