Answer: About 1.34%.
Explanation:
Given : About 50% of the population of Alaska lives within a 50-miles radius of Anchorage.
To find the area of the section within 50 miles , we need to find the area of the circle with radius = 50 miles.
Area of circle =

Then,
Area of the section within 50 miles=

Also, the area of Alaska is 586,412 miles.
Now, the percent of the total land area is within 50 miles of Anchorage :_

Hence, the percent of the total land area is within 50 miles of Anchorage= 1.34%