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Last week I had an engineering test and an aerospace test, both of which seemed to go well. The aerospace test especially was easy, since it was open book and open notes. It was basically just a little algebra and plugging in numbers. The engineering test was a little harder, but I got the results already and I did pretty well.
For the engineering homework that is also due tomorrow, I had to calculate the size of a parking lot required to hold the estimated 200 million vehicles in the US. In order to determine the size of a parking lot required to hold all the cars in the U.S., I researched the size of parking spaces. According to Alameda County, CA, laws, a parking space must be at least 180 square feet, with a width of at least 9 feet and a length of at least 18 feet. (1) Using 180 square feet as the size for a parking space, 200 million cars would take up 36 billion square feet. This is equal to 1,291 square miles, or roughly two-thirds the size of the state of Delaware (2). And this doesn't even include the throughways to access the parking spaces. If the parking spaces are perpendicular to the flow of traffic, the aisles must be at least 12 feet wide for one-way traffic. If this theoretical parking lot were square and the parking spaces were 10 ft x 18 ft to make the each 180 square feet, there would be 21,909 cars parked side-by-side in each of 9,129 rows, with each row including half of an aisle. The new size would be (18ft+6ft)(9129) x (10ft)(21909) = 48 billion square feet, or 1,722 square miles, 88% of the size of Delaware.
I have now gotten back assignments in all my classes. I got a good score on my aerospace homework, and about average on the others. But now I know what I need to do (at least for the most part), so hopefully the rest of my scores will be better. Unfortunately for the math homework I got back, only four out of 20 or so problems were graded, and one of those graded was the main one I had trouble with (a complicated anti-derivative), so that's why I didn't do too well. But I think I pretty much understood the stuff for the second homework.