The symbol for USD can be written $. The Canadian Dollar is divided into 100 cents. The United States Dollar is divided into 100 cents. The exchange rate for the Canadian Dollar was last updated on October 13, 2015 from The International Monetary Fund.
Although brain development is subject to significant individual variation, most experts suggest that the brain is fully developed by age 25.
Stages of Cognitive Development. Figure 1. The Inspiration web above illustrates Piaget's four cognitive development stages; sensorimotor (birth-2 years), preoperational (2 - 7 years), concrete operational (7 - 11 years), and formal operational (adolescence - adulthood). The first stage, sensorimotor, begins at birth and lasts until 18 months-2 years of age.