What's the ratio of 12 and 28?

Answer this question only if you know the 30 points and

Find the difference (8ab+a+2) - (3ab+6)

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 .