Suppose that the functions s and t are defined for all real numbers x as follows s(x)=x+6
t(x)=2x^2
evaluate (s-t)(2)

Aresearcher believes increased perceived control influence the well-being of residents at a nursing home. to test this , she allowed one group of residents to have control over their daily lies, (where to eat etc) . the other group of 5 residents had these deceisions made by staff. the resident's feelings of well-being were measured on a 10 point scale at the end of a one month trial period. is there a difference on well-being?