To show : which of the statements is independent event
By definition of independent events, if there are two things occurred then the occurrence of first event is not dependent on occurrence of second event or vice versa.
if we notice in all statement occurrence of first event is dependent on occurrence of second event except the last one as knowing that you have a test in a school tomorrow and bringing an umbrella to school have no such dependency or need.
4 • x = 44 Since the inverse of multiplying is dividing you would divide 44 by 4 which would be 11. 4 • 11 = 44. So the number of teeth on the rear gear would be 11.