The number of cell phone subscribers in the U.S between the years 2000 and 2010 is approximated  by the function N (t) = 385.474 divided by 1+2.521e-0.214t ( 0 , < or equal t < or equal 10) where  N (t) is measured in millions and t  is measured in years, with t = 0 corresponding to the year 2000. How many cell phone subscribers were there in the United States in 2000? If the trend continued, how many subscribers were there in 2012?

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Q: 6

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Sequence and Series

A sequence is defined as a collection of things. Series is defined to sum the things one by one in the sequence.  It was invented by German mathematician Carl Friedrich Gauss.