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Murljashka [212]
3 years ago
6

Which of these things does not show that a reaction has occurred?

Mathematics
2 answers:
Rus_ich [418]3 years ago
7 0
I believe it may be C. Because, the color changing has nothing to do with the reaction you get.
Taya2010 [7]3 years ago
7 0
If my hypothesis is correct, the answer should be B. All answers, A, C, and D are chemical reactions. They are all reactions, but B does not fit the category, so they only answer could really be B. (I debated between both A and B because those are the only answers that can be correct)

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Answer:

C. Cos(28) = \frac{15}{17}

Step-by-step explanation:

Recall: SOHCAHTOA

Thus,

Cos(\theta) = \frac{Adjacent}{Hypotenuse}

Reference angle = 28°

Adjacent = 15

Hypotenuse = 17

Plug in the values

Cos(28) = \frac{15}{17}

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