In which of the following groups are the formal and informal leaders of the same people, at least at the beginning of the group?

a. school admin
b. family
c. circle of high school friends

Facial shaving brushes are either bulb-shaped or fan-shaped. an experiment is to be conducted to determine whether the lather thickness is the same for both types of shaving brushes. in previous studies, it was determined that shaving brush size (small, medium, large) is associated with lather thickness, but shaving brush type (wolf whiskers, maggard razors, frank shaving, and so on) is not associated with lather thickness. how could the experiment best be conducted? by blocking on shaving brush size by blocking on shaving brush type by blocking on shaving brush shape by blocking on lather thickness without blocking

What drifted apart millions of years ago to create two different worlds

Most signs are diamond-shaped, with a yellow background and black letters or symbols. a. regulatory b. guide c. warning d. construction