He earned a lot of money. He bought a house. ( Make
infinitive )pls tell

Can someone answer this question? : )

Which of the following is true for the relation f(x)=2x^2+1

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 .