As part of a beautification activity at Cynthia's junior high school, the students planted flowers in prepared planters. There are two types of planters, small and large. There are 45 planters in total. The students planted 2 salvias and 2 marigolds in the small planters, and 7 salvias in the large planter. The flowers planted in all the prepared planters totaled 231. How many marigolds were planted in the planters?

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 )