Answer:
a. Barricade the area or position a worker in front of the ladder.
Explanation:
When one is using a ladder which has to be placed against the building on the sidewalk, the precaution used must be (from the four options) :-
<u>a. Barricade the area or position a worker in front of the ladder.</u>
This is because the area in which the worker is putting the latter is the prone are where the worker or the ladder might hit the pedestrian or any thing which can cause harm to the nature and mankind and that's why, the area must be blocked or defended with an improvised barrier.
Answer:
higher literacy rates and good education leads to
productive workers leads to
higher wages leads to
investment in human capital leads to
higher standard of living
Explanation: Hope this helped a bit :)
Answer: order of test items
Explanation: An independent variable is a variable that is specifically manipulated by a researcher to investigate whether it consequently brings about change in another variable. The other variable, which is measured and predicted to be dependent upon the independent variable, is known as the dependent variable.
In the experiment above, the independent variable is the order or arrangement of the test items. The instructor gave two sets of order to two groups of students to study effect of the order on test scores. The effect on the test scores may be dependent on the order the tests were arranged.