I need a answer for this question! What did the 2009 collision of a United States satellite and a Russian satellite cause?

What refers to the existence of more than one level of government in the country

How do most people in israel and its neighbors differ from political extremists such as terrorists

For each of the following examples of data, determine which scale of measurement is used. a) the number of miles joggers run per week. b) the starting salaries of graduates of mba programs c) the months in which a firm's employees choose to take their vacations. d) the final letter grades received by students in a math course.