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.
Answer:
"There are 30 chairs in 5 rows. How many chairs are in each row?" Would be the correct story problem.
Hello!
To find the area of a trapezoid you use the equation
Put in the values you know
Add
Divide
Divide both sides by 26
15 = h
The answer is 15km
Hope this helps!