Jill has music lessons every 3 days and swimming lessons every 8 days. If she has both lessons on the first day of the month, in how many days will she have both lessons on the day again?

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 .