Suppose the number of endangered species y can be approximated by the formula 
where t is the number of years past 1980. How many species does the formula estimate will be added to the endangered species list between 2007 and 2020? Round your answer to the nearest whole number.
Definitions:
Critical Period
A specific time in development when the presence or absence of certain experiences or stimuli has a long-lasting influence on the individual.
Critical Period
A specific time frame during the development of an organism when it is particularly sensitive to certain environmental stimuli that are necessary for proper development.
Scientific Method
A way to answer questions using empirical research and data-based conclusions.
Framingham
A city in Massachusetts known for the Framingham Heart Study, a long-term, ongoing cardiovascular cohort study.
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