1 ) A building casts a shadow 48 feet long. At the same time, a 40-foot-tall flagpole casts a shadow 9.6 feet long. Which of the following is NOT a valid proportion to find the height of the building 2 ) Samuel is building a model of an antique car. The scale of his model to the actual car is 1:10. His model is 18.5 inches long. How long is the actual car?

3 ) Stonehenge II in Hunt, Texas is a scale model of the ancient construction in Wiltshire, England. The scale of the model to the original is 3 to 5. The Altar of stone of the original is 4.9 meters tall. How tall is the altar in the model?

4 ) Mason sold 10 wristbands and made a of total of 5 dollars. How much did he sell each band for? (Find the unit rate)