1. Rahul started his homework at 5.25 and ended his homework at 6:40. Find the elapsed time.
2. The math club started their meeting at 4:15 pm. If the meeting was an 1 hour and 35 minutes long,
what time did it end?

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 .