Question 288755
The best answer is insufficient data.
70 F is not 1.4 times 50 F
Any calculations that multiply temperature have to use "absolute zero" as reference.
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70F = 21.11C
50F = 10C
That makes the ratio 2.11 instead of 1.4.  Now what?
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The author of the problem doesn't know what he/she is talking about.