Acontractor has two choices for billing a completed job. · $500 flat rate, regardless of the number of hours worked · $20 per hour worked

The solution (25, 20) tells the contractor the number of hours on a job where the hourly rate is the same for both billing options.

Step-by-step explanation:

Step-by-step explanation:

Given that a contractor has two options for billing a completed jo

i) 500 dollars flat rate

ii) 20 per work worked

Let x hours be worked for completing the contract

Then we find that by I contract he would get 500 $ but by II choice he would get 25x dollars

We find that

25x<500 if x<20

Hence if number of hours worked is less than 20, I choice 500 flat rate is prefereable

If number of hours is more than 20, hourly rate i.e. 20 per hour is better

yes. we do proportions in probabilities.