The top bottom of trapezoid is 8 cm, the bottom is 6 cm, the area of shadow part is 12 square cm, and the area of blank part is how many square cm? On August 8, 2008, Beijing has successfully held the 29th Olympic Games. There are about 4125.5 million people watching TV in the world. The unit of "ten thousand people" is () ten thousand people, and the mantissa after "hundred million" is () hundred million people If you sell a pen for 100 yuan, you can earn 25%. If you sell it for 120 yuan, how much can you earn

The top bottom of trapezoid is 8 cm, the bottom is 6 cm, the area of shadow part is 12 square cm, and the area of blank part is how many square cm? On August 8, 2008, Beijing has successfully held the 29th Olympic Games. There are about 4125.5 million people watching TV in the world. The unit of "ten thousand people" is () ten thousand people, and the mantissa after "hundred million" is () hundred million people If you sell a pen for 100 yuan, you can earn 25%. If you sell it for 120 yuan, how much can you earn

The top of trapezoid is 8 cm, the bottom is 6 cm, the area of shadow part is 12, how many square centimeters is the area of blank part? 36 square centimeters on August 8, 2008, Beijing has successfully held the 29th Olympic Games, there are about 4120.5 million people watching TV in the world, using "10000 people" as the unit is (4120.5 million)