What is the solution of the inequality shown
below?
y-1 > 0

y>1

Step-by-step explanation:

y-1 > 0

Add 1 to each side

y-1 +1> 0+1

y>1

To minimize the cost, we take the straight distance from the refinery to the other side of the river as 2 km. Also, the 7 km will be the distance that has to be traveled by the pipeline in land. The total cost, C, is therefore,
               total cost =   (2 km)($800,000/km) + (7 km)($400,000 /km)
                    total cost = $4,400,000
Thus, the total cost of the pipeline is approximately $4,400,000.00.