1 This generally includes replacing a few parts like hoses, sensors, or either the compressor or condenser. 2  CostHelper readers report paying $171-$727 for minor air conditioning repairs, at an average cost of $488. 3  Extensive auto air conditioning repairs can cost $1,000-$4,000 or more, depending on make and model.
Their numerical system is similar to that of the Romans, but instead of Xâs and Iâs they use dots, bars and shells. Each dot has the value of one, each bar the value of five, and each shell the value of zero. This brings us to the main mathematical contribution of the Mayans, the concept of zero.
These were a major part of their culture and were used for many purposes in everyday Mayan life. The Mayans also had a writing system, known as Mayan hieroglyphics (not for any true relation to the Egyptian hieroglyphics, but rather because they were thought similar in appearance). This script had over 1000 characters.n fact, they are considered one of the most scientifically advanced societies in Mesoamerica. Amongst other accomplishments, they created a variety of weapons (including spears, clubs and blades) with very little to no metal; instead, they used brittle minerals such as obsidian and chert.