Ward notices that as his supply of marijuana decreases he starts thinking more and more about where he can get another supply as well as feeling nervous and anxious. this is an example of

Rank the following from most to least devasting: ordovician,permaian,cretaceous, pleistocene

What does it signify if point 1 shifts down and to the right? a. the price level and the real gdp are falling. b. the real gdp is falling, and supply is increasing. c. the price level is rising, and production is increasing. d. the price level is falling, and demand and the real gdp are rising.

Donald is studying the eating habits of all students attending his school. he samples the population by dividing the students into groups by grade level and randomly selecting a proportionate number of students from each group. he then collects data from the sample. which type of sampling is used? select the correct answer below: systematic sampling convenience sampling stratified sampling cluster sampling