I need help with solving and figuring out the answer.

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 .

What is the sum of the first 8 terms of the geometric series

If f(x) = 4x - 3 and g(x) = x + 4, find (f - g) (x)