Cinta reviewed her notes about genealogical research before the class discussion. She was ready to share her information with her classmates and then answer questions. When Mr. MacGregor asked if she was ready, Cinta smiled and nodded her head. What is the purpose of the class discussion

Formal

Explanation:

When individuals are asked to prepare to speak before an audience, they are expected to have understood what they have been told to do as they would be engaged in the presentation in a formal way. The formal way implies that there would be no familiarity, everything would be done strictly on business; the questions would be asked as though she had the best knowledge about what she is presenting. She would be expected to present it as a professional.

jupiter is mainly composed of hydrogen and helium just like a star. spectral analysis of jupiter has revealed that in addition to hydrogen and helium, the planet is made of water, methane and ammonia. those elements are in trace amounts. the core of the planet is thought to contain some rock and metallic hydrogen. i hope this will give you the answer to your question! : d

productive most commonly means: achieving or producing a significant amount or result.

explanation:

productive can also mean:

these depend on how the word productive is used. most likely productive will mean   achieving or producing a significant amount or result.