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.
The Mayans used their great understanding of astronomy to create calendars that are as accurate as calendars used in the 21st century. They managed to build large temples and cities with only basic tools and manpower while also using minerals, such as mica, to create paints that are still used used in art and other technology today. The Mayans were also responsible for developing a written language that consisted of 8,000 symbols or glyphs.