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.
Credit: danisabella CC-BY 2.0. The prefrontal cortex, which begins to develop around the onset of puberty, does not complete its development until age 25. This section of the brain controls impulse inhibition, goal planning and organization.