Models can be conceptual, graphical or mathematical as they are used in science. It allows one to break down a concept into simpler terms with a visual component. A limitation of models in science is that they are usually simplified versions of the real situation or concept.
The correct answer is A!!
The correct answer is 40 to 45 percent
People holding regular manual or blue-collar jobs. Certain members of this class, such as electricians, may have higher incomes than people in the lower-middle class. Roughly 40 to 45 percent of the United States
Explanation:
sorry couldn't get the full pic..but this is the answer.