A Power Station Is on One Side of a River $\$$

Multiple Choice

A power station is on one side of a river that is 0.5 mile wide, and a factory is 6.00 miles downstream on the other side of the river. It costs $\$$ 18 per foot to run overland power lines and $\$$ 25 per foot to run underwater power lines. Estimate the value of x that minimizes the cost.

A) 4.00
B) 0.52
C) 5.00
D) 0.00
E) 1.52