Answer quickly!! If you have 2 lamps you can make the following signals (lamp can be on or off).
How many lamps do you need to make 60 different signals?

1wthejjebehdn ejdjendnjdnendidne udhejhe djjenejejdjhv95 ag 55wo47wly4wl4uwo46qly4wlu4wly4wtieoyarpyrsou4spu46rsourso64so64so64so64o6raryoaours6oousrosuro6rso6sor6

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 )