Solve application of absolute value.  (a) develop a model that uses an absolute value ineq...

Solve application of absolute value.  (a) develop a model that uses an absolute value inequality, and (b) solve.

Traffic studies: On a given day, the volume of traffic at a busy intersection averages 726 cars per hour (cph). During rush hour the volume is much higher, during “off hours” much lower. Find the range of this volume if it never varies by more than 235 cph from the average.