japerson
14.09.2019 •
Mathematics
you find a partly empty long-abandoned jar of sodium cyanide in your lab and you wish to turn it over to your ehs department for safe disposal. however, they first wish to know a good estimate of the mass of the nacn they'll need to dispose. you don't want to handle the so you measure the weight of the jar containing the nacn and find it to be 4.387e-3 ton (us). you then contact the chemical's producer and they tell you the weight of an identical but empty jar would be 0.8025 lbm. what is the weight, x ton (us) , of the nacn that you should report to ehs?
(hint: |x| is near an order of magnitude of 10-3 ton (us) ).
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Ответ:
∠2 = 2x
∠3 = 3 * 2x = 6x
x + 2x + 6x = 180
9x = 180
x = 180/9
x = 20° ← the first angle
the second angle = 2 * 20 = 40°
the third angle = 3 * 40 = 120°