Which of the following expressions are equivalent to \dfrac{-19}{8}\cdot (-50) 8 −19 ⋅(−50)start fraction, minus, 19, divided by, 8, end fraction, dot, left parenthesis, minus, 50, right parenthesis? Choose all answers that apply: Choose all answers that apply

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?