Which numbers can best be used to estimate 630,429 – 27,811? choose exactly two answers that are correct. a. 630,400 b. 630,500 c. 27,800 d. 27,900

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 .