3 is in the hundred millions
Answer: 285.2 kg
Step-by-step explanation:
Given
The volume of helium in the balloon is 
The density of the helium is 
Mass of the helium gas is given by the product of density and volume

Thus, the mass of gas is 285.2 kg
Answer:
A or D is the answers for the question
Step-by-step explanation:
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Yeah D is the correct answer
4 and 5
hope this helped in some way..