If 4 hens lay 7 eggs in three days, how many eggs will 12 eggs lay in 9 days?

How do i get the answer for 2/3 * 10/3

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 .

Twelve less than a number is at most 20