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.
a) It is vigesimal, this means that it is based on 20 units [0 - 19] instead of the 10 units [0 - 9] of the decimal system. This table shows the first 20 numbers and their Arabic equivalents. Learn the Maya mathematical system fast using THE MAYA CALCULATION ASSISTANT. The Mayan names for numbers are here. b) It only uses three symbols, alone or combined, to write any number. These are: the dot-worth 1 unit, the bar-worth 5 units and the zero simbolized by a shell.