Answer: [tex]\dfrac{2}{13}[/tex]
Step-by-step explanation:
Given : Time spent on developing an estimate for a job = 30 minutes
Time taken by job itself to complete = 2 hours 45 minutes
=[tex]2\times60+45=165\text{ minutes}[/tex]
Now, the ratio of the time spent on the job estimate to the total time spent (including the time spent calculating the estimate) on this job will be :-
[tex]\dfrac{30}{165+30}=\dfrac{30}{195}=\dfrac{2}{13}[/tex]
Hence, the ratio of the time spent on the job estimate to the total time spent (including the time spent calculating the estimate) on this job is [tex]\dfrac{2}{13}[/tex].
