Lesson 8

1. Lesson 8

1.5. Explore

Mathematics 20-1 Module 4

Module 4: Quadratic Equations and Inequalities

Explore

Solar City Tower in Brazil will welcome visitors and participants to the 2016 Olympic Games at Rio de Janeiro.

Olympic Games 2016 Rio de Janeiro Solar City Tower Concept Design Photo (Zurich: RFAA Architecture and Design, 2011.) Reproduced with permission.

The Solar City Tower in Brazil is an example of a structure that has been conceived with sustainability in mind. The symbol of the 2016 Olympic Games in Rio de Janeiro, the Solar City Tower will be seen by all those who arrive at the Games by air or water. The immense building is remarkable not only for its panoramic views, urban plaza, amphitheater, cafeteria, and shops, but also for its eco-friendly design that will feature a massive system for capturing solar energy. By day, the solar system will generate energy for the Olympic Village as well as some energy for the city of Rio. By night, a hydroelectric system of stored water and turbines will deliver energy to these same places. The Solar City Tower will be the home of the Olympic torch and will also feature a waterfall, which, according to its designers, symbolizes the “forces of nature.”

In this lesson you will use quadratic inequalities to model problems that deal with aspects of sustainable architecture, such as those exhibited by the Solar City Tower.

You already saved Module 4 Glossary Terms in your course folder. In this lesson you will define these terms, and maybe others, in your copy of Module 4 Glossary Terms:

quadratic inequality in one variable
critical value
interval
sign analysis
case analysis