The call centre received its highest number of enquiries between 3:00 p. m. And 4:00 p. m. Which was 40% more than the 250 enquiry. It received between 2:00 p. m. And 3:00 p. m. How many calls did the call centre received between 3:00 p. m. And 4:00 p. m.

answer: evaluate the objective function at each vertex to determine which - and -values, if any, maximize or minimize the function. example: find the minimum value and maximum value of the objective function f ( x , y ) = 4 x + 5 y , subject to the following constraints