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22-09-2016
Mathematics

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the spoke of a wheel reaches from the center of the wheel to its rim. if the circumference of the rim the wheel is 48 inches, how long is the spoke? use 3.14 for pie, and round your answers to the nearest hundredths. a. 15.29 inches b. 12 inches c. 8 inches d. 7.64 inches

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Аноним Аноним

22-09-2016

Circumference of a circle (in this case a wheel=circle)=2πr
radius=spoke=r
Data:
circumference=48 in
π=3.14

Threrefore:
48 in=2(3.14)r
6.28r=48 in
r=48 in / 6.28
r=7.64 in

answer: d. 7.64 inches.

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