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Ksenya-84 [330]
2 years ago
13

Can someone please help me with math.

History
1 answer:
Helga [31]2 years ago
5 0

Answer:

D.

Explanation:

It goes over the X axis and stops. It can't be B. because it isn't reflecting across y=-1.

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umm here are some facts about it!Hope this helps!

The first cylinders for storing oxygen were developed in 1868,5 which allowed its use in general anesthesia. By 1885, George Holtzapple used oxygen to manage a young patient with pneumonia, and established its role in acute care.

"The existence and properties of oxygen had been noted by many scientists before the announcement of its isolation by Priestley in 1774. Scheele had also succeeded in preparing oxygen from a number of substances, but the publication of his findings was delayed until after that of Priestley's. As a result, Priestley and Scheele are credited with the discovery of the element independently. The fact that the gas is a component of the atmosphere was finally and definitely established by Lavoisier a few years later. In 1929, W. F. Giaque and H. L. Johnston announced the discovery of two isotopes of oxygen, of mass numbers 17 and 18.

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if you would like to know more here you go! This website helped me a lot!! https://encyclopedia2.thefreedictionary.com/oxygen+regulator

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