how many people attended obamas first inauguration
During this problem we were given a satellite picture of Obamas inauguration and we had to measure all the people who were there. We did this by measuring the size of the area in the picture and then finding the area of the National Mall in real life. After this we found a scale and measured the area of the place in real life. Then we found that the average person occupies an area of 2.5 feet squared. We found an equation that told us how many people fit in the area of the National Mall and found that about 1.8 million people were there.