In a group of 700 people only 5% of them have red hair how many people hade red hair
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So since it is a 50 mile radius around one point, then it makes a circle. You need to find the are of the circle to find out how much land that is. you use the equation A=
r². Plug 50 in for r and you get A= 50². 50²=2500. Then you multiply that by 3.14 (rounded number of pi) and you get 7850. So, now you have the total land area, now you need the percent of the total Alaskan land. To do that, you make a proportion. 
= 
Then, you cross multiply and get 785,000=586,412x. To find out what x is, you divide both sides by 586,412 and get x=1.3386 % . Hope this helps!!