The street fair charges an admission price of $5 per person. In the first hour, one gate admitted 10 people. In the second hour, the gate admitted 20 people. Which mathematical expression below represents the scenario? A. 10 + 20(5)
B. 5(10) + 20
C. 5(10 + 20)
D. 5(20 - 10)

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 .