Helen draws a random circle.
She then measures its diameter and circumference.
She gets a circ...
Mathematics, 18.04.2021 14:50 FlowerChild1229
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.​
Answers: 3
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