A school library opened in 1980. In January 2000 they had 30,000 books. One year later..

Bob

New member
...they had 30,480 books.? Assuming that they aquire the same number of books at the start of each year then

What is the linear formula for the number of books, N, in the library as a function of the number of years, t, the library has been open.
 
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