Francis uses 2/3 cup of pineapple juice for every 1/3 cup of orange juice to make a smoothie. enter the number of cups of pineapple juice francine uses for 1 cup of orange juice.

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 .