Lacy recorded the number of minutes she exercised each day for 2 weeks. The results are listed below. Week One: 20, 30, 15, 25, 30, 20, 0
Week Two: 25, 15, 20, 35, 30, 25, 40

What is the approximate difference between the mean number of minutes exercised for week 1 and the mean exercised for week 2?

A. 3.8
B. 5.0
C. 7.1
D. 11.2​

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 )