A group of forest rangers are hiking through Denali National Park towards Mt. McKinley, the tallest mountain in North America. From their campsite, they can see Mt. McKinley, and the angle of elevation from their campsite to the summit is 21\". They know that the slope of mountain forms a '12?\" angle Iwith ground and that the vertical height of Mt. McKinley is 20,320 feet. To one decimal lace, how far away is their campsite from the base of the mountain {y}? feet If they can hike 2.9 miles in an hour, how long will it take them to get the base? Use {1' = n' and round to one decimal lace hours M 1" I27"