In 1980 the number of zebras in the Kruger national park was estimated to be 22 500.In 2010 the number of zebra was estimated to be 30 000 Calculate the avarage percentage increase per annum in the zebra population over the 30 year period​

Answer this two poles, ab and ed, are fixed to the ground with the of ropes ac and ec, as shown: two right triangles abc and edc have a common vertex c. angle abc and edc are right angles. ab is labeled 13 feet, ac is labeled 15 feet, ec is labeled 10 feet, and ed is labeled 4 feet.what is the approximate distance, in feet, between the two poles? 11.14 feet16.65 feet14.35 feet15.59 feet