Tag Archives: Danish language

Math in the 20th and 21st Centuries

1. Teaching Math In 1970 A logger sells a truckload of timber for $100. His cost of production is 4/5 of the price. What is his profit? 2. Teaching Math In 1980 A logger sells a truckload of timber for $100. His cost of production is 4/5 of the price, or $80. What is his […]