Which relation is a function?
1 answer:
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Answer:
It will take 4.5 hours for rick to complete the job.
Step-by-step explanation:
Given:
Time taken by Phil to paint the garage = 12 hours.
It means that for each hour he does = of the job.
.
Time taken by Rick to paint the garage = 10 hours.
It means that for each hour he does = of the job
.
If they work together for 3 hours,
Phil does job in 3 hrs =
Rick does job in 3 hrs =
.
So in three hours of working together job done =
.
This means job of the painting entire garage have been done 0.55 of it.
1 - 0.55 = 0.45.
So there is 0.45 job left
At this point Phil quits and Rick presses on by himself. Since he does 1/10 of the garage every hour
Let T represents the time that Rick needs to complete the job after Phil leaves.
Hence,
Hence it will take rick 4.5 hours to complete the remaining job.
Answer:
The radius of the cylinder is 3 inches.
Step-by-step explanation:
For any given cylinder, the volume can be expressed as:
volume = h
where r is the radius of its circular surface, and h is its height.
Given that: volume = 54π cubic inches, and the height = 6 inches.
then,
54 =
x
x 6
54 = 6
=
= 9
r =
r = 3
The radius of the cylinder is 3 inches.