Is 9.90 greater than or lesser than 9.9

Hundred and tens tables to make 430 in five different ways

Write the equation of the circle centered at (10,-2) with radius 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?