Please help

A 297 and 323
B245and 323
C 297 and 369
D 323 and 369

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 .

Find the area of the unshaded square

Landon wrote that 3−2.6=4. which statement about his answer is true?