Why producers sometimes they cannot determine their price​

Mr. mann's science students were experimenting with speed. they set up a 1 meter (100 cm) track. the students used balls instead of cars. the balls were different sizes and made of different materials. four at a time, students rolled balls around the track to see which had the fastest and slowest speeds. some of their data are shown in the table. which ball will take the longest to complete one lap around the track?

During the period from 1865 to 1898 how did the political/economic elite contain the demands of farmers and laborers for economic justice

Why has there been an increase in the older population within our prisons?