Answer: 8.5
Step-by-step explanation:
I just took the quiz last week.
First, let x be the number of hours it will take for Hector to finish the same job alone. This means that every hour, Hector can do 1/x of the job. The amount of work done by Shawn and Hector in 6 hours should be equal to 1 complete work. This can be expressed as,
(1/9 + 1/x)(6) = 1
The value of x is 18. Thus, Hector can to 1/18 of the job in one hour.
If the biker is going at the same rate than in 3 hours he should go 34.8 miles
I believe the answer is 240.
8000 * .03 = 240
40% of 180 is 72
1/4 of 320 is 80
therefore 1/4 of 320 is bigger