It is 4. because it says in the paragraph and I quote: "helium has a very low density. it is used in daily weather balloons to carry instruments that record, tempature, humidy, and pressure readings in the atmosphere.
        
             
        
        
        
Answer:
Explanation:
In Panama long pants or a knee length skirt are required. You shoulders must always be covered and men should wear polo's or button down shirts at all times. Shoes must also always cover your toes. While in america you have the right to choose your own outfits and usually do so based on the weather. Panamas dress code is similar to Americas because many times people in America will wear knee length shorts or skirts. Especially for formal events. Hope this helps :)
 
        
             
        
        
        
I think the answer is "Having seen the Statue of Liberty, the Grand Canyon is more impressive." The Grand Canyon has not seen the Statue of Liberty; you have, but you- or "I" - are nowhere in the sentence. To correct the sentence, it would need to read something like this: Having seen the Statue of Liberty, I find the Grand Canyon more impressive.
 
        
             
        
        
        
Packed into cattle cars, the Jews are tormented by nearly unbearable conditions. There is almost no air to breathe, the heat is intense, there is no room to sit, and everyone is hungry and thirsty. In their fear, the Jews begin to lose their sense of public decorum. Some men and women begin to flirt openly on the train as though they were alone, while others pretend not to notice. After days of travel in these inhuman conditions, the train arrives at the Czechoslovakian border, and the Jews realize that they are not simply being relocated. A German officer takes official charge of the train, threatening to shoot any Jew who refuses to yield his or her valuables and to exterminate everybody in the car if anybody escapes. The doors to the car are nailed shut, further preventing escape.