Answer:
its to make sure that the bridge stays up in its place
Explanation:
plz mark as brainliest
Answer:
The physical feature that makes up part of the border between Canada and the United States is the Great Lakes.
Answer: alternative D.
Explanation: Dr. DeVries should choose his sample population randomly in order for his research to be representative, even having a specific population, which is high school seniors, that he wants to study. By <u>choosing specifically students from an exclusive college preparatory school, he isn't considering how students from other schools might perform in his research test</u>. This would be a very important step for him to understand how the practice in problem solving affects the ability related to it. Otherwise, he will have a distorted result.
