Rosa ran 4 miles one day and 5 miles the next day. what was the percent of increase from one day to the next? a. 4% b. 5% c. 10% d. 25%

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 .