The number of pet dogs in the United States can be represented as  p(t) million where t is the number of years since 2003.† (a) Write a sentence of interpretation for  p(0) = 65.2. In the year  , there were           million pet dogs in the United States. (b) Write the function notation for the statement "There were 66.9 million pet dogs in the United States in 2009." p(      )=    ?

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