every 30 seconds, Joan places a correct puzzle piece. How long would it take her to complete a 3000 piece puzzle?
1 answer:
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Answer:
C
Step-by-step explanation:
The arc length is calculated as
arc = circumference of circle × fraction of circle
= 2πr ×
= 2π × 18 ×
= 36π × ( cancel 36 and 24 by 12 )
= 3π ×
= → C