Thomas jefferson believed it would take about 300 years to ultimately settle the frontier. about how many years did this actually take? a. 150 years b. 200 years c. 70 years d. 250 years

Hi,

The Western frontier took 137 years for it to be finally settled.

aug 15, 2012 - although van leeuwenhoek was not the inventor of the microscope, he advanced it more he loved to grind and focus a new lens in order to see the unseen world. most of leeuwenhoek's microscopes were silver. in a simple but significant experiment (1668), he demonstrated that worms found on

four sitting presidents have been assassinated while in office but the first was abraham lincoln,