Respuesta :
Answer: 1976
Steps:
Let t* be the year in which the population reached a count of 8920. Solve for t*:
[tex]P=200t+1720\\8920=200t^*+1720\\7200=200t^*\\t^* = 36[/tex]
The population grew to the number 8920 in 36 years past 1940, i.e., 1976