According to the United States Census Bureau, the city has a total area of 28.70 square miles (74.33 km2), of which, 27.83 square miles (72.08 km2) of it is land and 0.87 square miles (2.25 km2) is water, much of which is part of the Huron River. Ann Arbor is about 35 miles (56 km) west of Detroit. Ann Arbor Charter Township adjoins the city's north and east sides. Ann Arbor is situated on the Huron River in a productive agricultural and fruit-growing region. The landscape of Ann Arbor consists of hills and valleys, with the terrain becoming steeper near the Huron River. The elevation ranges from about 750 feet (230 m) along the Huron River to 1,015 feet (309 m) on the city's west side, near the intersection of Maple Road and Pauline Blvd. Generally, the west-central and northwestern parts of the city and U-M's North Campus are the highest parts of the city; the lowest parts are along the Huron River and in the southeast. Ann Arbor Municipal Airport, which is south of the city at 42°13.38′N 83°44.74′W﻿ / ﻿42.22300°N 83.74567°W﻿ / 42.22300; -83.74567, has an elevation of 839 feet (256 m).
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What river has an elevation of 570 feet?
Ah, so.. unanswerable

Mass production of glass window panes in the early twentieth century caused a similar effect. In glass factories, molten glass was poured onto a large cooling table and allowed to spread. The resulting glass is thicker at the location of the pour, located at the center of the large sheet. These sheets were cut into smaller window panes with nonuniform thickness, typically with the location of the pour centered in one of the panes (known as "bull's-eyes") for decorative effect. Modern glass intended for windows is produced as float glass and is very uniform in thickness.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): What were the areas at the center of window panes called?
Ah, so.. unanswerable

In 1991, there were only two proposals available that could be completely assessed for an MPEG audio standard: Musicam (Masking pattern adapted Universal Subband Integrated Coding And Multiplexing) and ASPEC (Adaptive Spectral Perceptual Entropy Coding). The Musicam technique, as proposed by Philips (the Netherlands), CCETT (France) and Institut für Rundfunktechnik (Germany) was chosen due to its simplicity and error robustness, as well as its low computational power associated with the encoding of high quality compressed audio. The Musicam format, based on sub-band coding, was the basis of the MPEG Audio compression format (sampling rates, structure of frames, headers, number of samples per frame).
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): How many proposals were available in 1991?
Ah, so..
two