Two researchers are studying the decline of elephant populations. In one study, a population of 1,568 elephants is expected to decrease at a rate of 50 elephants per year. In a second study, the population of a group of 1,634 elephants is expected to decrease at a rate of 72 elephants per year. After how many years will the two populations be the same?

After 3 years the populations will be the same

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 )