There are 250 known species of sharks. Of that number, only 27 species have been involved in attacks on humans. What percent of known species of sharkshave attacked humans?

Pls i’m dumb as heck i’ll give y’all so many points if that encourages you

Combine like terms to create an equivalent expression. make sure to simplify coefficients and constants as well. -6/5-2/3v+4/15+1/3v

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?