There were 3 times as many children as adults at the school book fair. if there were 81 children, what was the ratio of adults to total attendees at the book fair.

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

True or false? a circle could be circumscribed about the quadrilateral below.

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 .