The formula C=3.14d can be used to approximate the circumference of a circle given it diameter. Company A manufactures and sells a certain washer with an outside circumference of 12 centimeters. The company has decided that a washer whose actual circumference is in the interval 11.8≤C≤12.2 centimeters is acceptable. Use a compund inequality and find the corresponding interval for diameters of there washers.

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Answer: d. 39 cmin the diagram, the approximate length of the minor arc de is 39 centimetres.step-by-step explanation: the formula for the length of an arc in a circle is as displayed below.let the length of the minor arc de = xx = 2( pi )r × angle of sector / 360°from this, we will substitute the values given from the problem into the formula to obtain the length of the minor arc de.x = 2( pi )r × angle of sector / 360°r = radius = 25cmpi as an approximate value = 3.14angle of sector = 120°x = 2( 3.14 )( 25 ) × 120° / 360°x = 157 × 1 / 4x = 39.25x = 39 ( rounded to the nearest whole number as an approximate value )

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