The processor speeds, in megahertz (MHz), of Intel  processors during the period 1996–2010 can be approximated by the following function of time t  in years since the start of 1990:

a.  Compute lim _t→15− v ( t ) and lim _t→15+ v ( t ) and interpret each answer. 

b.  Is the function v  continuous at t  = 15? According to the model, was there any abrupt change in processor speeds during the period 1996–2010?

400t 2,200 if 6