Answer:
b. Do not install the guard rail because the costs exceed the benefits
Explanation:
The cost of the guard rail is $70,000.
The average damage to a car that slides off the road at the curve is $10,000.
Number of cars the guard rail is expected to save from sliding off the road is 5.
Therefore, Total damage prevented/saved is 5 * $10,000= $50,000
Total cost of installing the guard rail is $70,000
So, the cost exceed the benefits.
It is expected the county will not install the guard rail because the total cost outweighs the benefits.
