Answer:
Ellen is a Stationary Engineer who figures out what is wrong with machinery for heating a building.
Explanation:
<em>The qualification that is best demonstrated out of all the options would be that Ellen is a Stationary Engineer who figures out what is wrong with machinery for heating a building. </em>
Charlene's ability to stay on task has no direct correlation with being a highway worker.
Floyd's ability to lift heavy objects also has no direct correlation with being a repair worker.
Pedro's ability to explain a problem to a customer has no direct bearing on being a mechanical door repairer.
<u>The only option with direct correlation is a stationary engineer's ability to figure out what is wrong with machinery for heating a building.</u> A stationary engineer is also known as operating or power engineer.
Answer:
The incremental benefit cost ratio is less than 1 therefore we must select site 1.
Explanation:
The incremental BCR can be determined using the following formula

8% , 10)
⇒ 
⇒
8%, 20)
⇒ 
⇒
= $203,704.42
Incremental initial investment = 203,704.42 - 149,029.49
= $ 54,674.93
Incremental benefits = 580,000 - 520,000 = 60,000
Incremental O&M = 75,000 - 80,000 = - $ 5000
Incremental Disbenefits = 140,000 - 90,000 =$ 50,000

All solving using the present worth method also incremental benefit cost ratio comes out to be 0.2743.
The incremental benefit cost ratio is less than 1 therefore we must select site 1.