I would rather use a ruler but it depends on what you are doing.
The interest would be $123.5
Answer:
Area of the flying saucer = 
Step-by-step explanation:
The Flying saucer is in the shape of a circle.

Area of the circular flying saucer= 
:
Area= 
Area of the flying saucer 
So, the area of the flying saucer is 
Plug in the values
3(5) - 5(1)
15 - 5 = 10
Solution: 10