$6,000 is invested in two different accounts earning 3% and 5% interest at the end of one year to two accounts earn $220 in interest how much money was invested at 3% A:$4000
B:$2000
C:$3000

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?