A statistical question anticipates that answers will vary. Which of these are examples of statistical questions?A)What did Sally eat for lunch today?B)How many brothers does Andrew have?C)How many eucalyptus leaves does a koala eat each day?D)How many minutes does each student spend texting each day?E)How many math classes are taught by Mr. Martin this semester? ! Mulitiple choice

c and d

Step-by-step explanation:

A statistical question is a question that can be answered by collecting data that vary. For example, “How old am I?” is not a statistical question, but “How old are the students in my school?” is a statistical question.

5

step-by-step explanation:

reduce the friction between its moving parts

step-by-step explanation:

in fact, by reducing the friction between the moving parts of the machine, it is possible to reduce the energy wasted due to this friction; therefore, more input energy is converted into useful work, and this will improve the efficiency of the machine.