Helen draws a random circle. She then measures its diameter and circumference.She gets a circumference, C, of 405 mm correct to


Helen draws a random circle.
She then measures its diameter and circumference.She gets a circumference, C, of 405 mm correct to 3 significant figures.She gets a diameter, d, of 130 mm correct to 2 significant figures.Helen wants to find the value of it using the formula n =1 =Calculate the lower bound and upper bound for Helen’s value of .Give your answers correct to 3 decimal places.​


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