Consider a specific example of the special-interest effect and the collective-action problem. In 2012, it was estimated that the total value of all corn‐production subsidies in the united states totaled about $3 billion. The population of the united states was approximately 300 million people that year.

Carlo is wondering what causes plants to grow at different rates. carlo’s hypothesis is “plants will grow more when the day is longer.” what would be the difference between the test group and the control group in this experiment? type of soil type of plants exposure to sunlight method for measuring the growth

17 a tourist was planning a trip by car for travelling at some constant speed for 2.5 hours. however, he found that if he increases the speed by 20 km/h he can cover the same distance in 30 minutes less time than it was planned. what was the planned speed of the tourist, in km/h?

If you are in grade when should you start studying for exams