Stibnite is a silvery white mineral with a metallic luster. It is one of the few minerals that melts easily in a match

Anonymous
timer Asked: Jun 15th, 2018
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Stibnite is a silvery white mineral with a metallic luster. It is one of the few minerals that melts easily in a match flame or at a temperature of approximately 977°F or greater. Find the Celsius temperature for which stibnite melts [Use the formula C space equals 5 over 9 left parenthesis F minus 32 right parenthesis.] A. [525, ∞) B. (-∞, 525] C. [510.8, ∞) D. (-∞, 525]

Tutor Answer

Borys S
School: Cornell University

The answer is A, the explanation is in the attached file (number 1).

1. The melting temperature is

5

5

(977 − 32) = ∙ 945 = 5 ∙ 105 = 525.
9
9

This temperature and all above are suitable, so the interval is [𝟓𝟐𝟓, ∞). (A).

4

2. The number line shows 𝑥 < 3. The first inequality gives...

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Anonymous
Thanks, good work

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