holleyhood holleyhood

12-04-2017
Mathematics

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What is the best estimate of the circumference of a circle with a diameter of 47mm: a) 141 mm b) 139mm c) 121mm d) 100mm

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Saraaaaa Saraaaaa

12-04-2017

Circumference = pi x diameter

C=(3.14)(47)
C=147.58

But if you're estimating, you would round pi (3.14) to 3.

C=(3)(47)
C=141

Your answer is
a) 141

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