Suppose that the minimum number of buses required during the ith hour of the day be denoted by bi (i=1,…,24). Each bus works for 6 consecutive hours. If the number of buses during the ith hour is more than bi, then a cost (Ci) incurs per hour per bus. Formulate the problem as a linear programming problem to minimize the total cost of extra buses.

f is the midpoint of

2. angles qrt and qst both measures 156 degrees.

step-by-step explanation:  

we have been given a diagram of a circle and we are told that measure of arc qvt is 156 degrees.  

we can see from our given diagram that angle qrt and angle qst subtends to arc qvt.

since we know that angles subtended by the same arc at the circumference are always equal.

by angle subtended by same arc theorem, measure of angle qrt and angle qst will be equal to the measure of arc qvt.

therefore, angles qrt and qst both measures 156 degrees and 2nd statement is the correct choice.

i hope this is what you were looking for.

see attached graph