Explain how you know which coins could be used to show 0.77 of a dollar
1 answer:
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Answer:
≈ 11.78 in
Step-by-step explanation:
The arc length is calculated as
arc = circumference of circle × fraction of circle
= 2πr × ( cancel 2π on numerator/ denominator )
= 15 ×
=
≈ 11.78 in ( to 2 dec. places )