Recent surveys indicate 60% of tourists to china visited the forbidden city, the temple of heaven, the great wall, and other historical sites in or near beijing. forty percent visited xi’an with its magnificent terra-cotta soldiers, horses, and chariots, which lay buried for over 2,000 years. thirty percent of the tourists went to both beijing and xi’an. what is the probability that a tourist visited at least one of these places? (

Need to finish my juan wants to build a greenhouse in his back yard. he needs to maximize the ratio of floor area to structure volume in order to provide the most room for plants while minimizing the area to be heated. find the description of the structure that best meets juan’s criteria. a.) a hemisphere with a diameter of 12 feet b.) a cube with a side length of 12 feet c.) a cone with a diameter of 12 feet and a height of 10 feet d.) a square pyramid with a base side length of 12 feet and a height of 9 feet