Hi want to talk lets talk

Density of salty water as compared to the density of pure water is(a) is less(b) is always equal(c) is always more(d) may be less or more

According to social exchange theory, altruistic behaviors benefit the individual who performs them. t/f

22. the effect of threshold braking is to a cause skids. b. lock wheels. c. prevent locking of wheels. d. increase stopping distance.