A cell site is a site where electronic communications equipment is placed in a cellular network for the use of mobile phones.The numbers of cell sites from 1985 through 2008 can be modeled by where t represents the year, with corresponding to 1985.Use the model to find the numbers of cell sites in the year 2007 .
A)211,071
B)209,071
C)208,071
D)207,071
E)210,071

Question

A cell site is a site where electronic communications equipment is placed in a cellular network for the use of mobile phones.The numbers of cell sites from 1985 through 2008 can be modeled by  where t represents the year, with  corresponding to 1985.Use the model to find the numbers of cell sites in the year 2007 . ​
A)211,071 
B)209,071 
C)208,071 
D)207,071 
E)210,071

Quizplus · Accepted Answer

To find the number of cell sites in the year 2007, we need to substitute t = 2007 into the given model. 
11eacce6_1fd0_e6fc_9f49_b7ebec8b47c3_TB7896_11 becomes 
11eacce6_1fd1_0ff8_9f49_be5dcefd1c5a_TB7896_11 
= 11(2.718)^((2007-1985)/3)
= 11(2.718)^7
= 208,071 (approx.) 
Therefore, the best choice is B.

A Cell Site Is a Site Where Electronic Communications Equipment