Answer:
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Step-by-step explanation:
Answer:
the cost for each gallon is 2.59
Step-by-step explanation:
Answer:

Step-by-step explanation:
step 1
Find the area of the circle
The area of the circle is

we have
----> the radius is half the diameter
substitute


step 2
Find the area of a sector
Remember that
The area of the circle subtends a central angle of 360 degrees
so
using proportion
Find out the area of a sector with a central angle of 108 degrees

assume

substitute

I got the second one done, I️ just need to know the formula for recursive and explicit formula