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hichkok12 [17]
2 years ago
13

wyoming electric coop owns a steam-turbine power-generating plant. because wyoming is rich in coal deposits, the plant generates

its steam from coal. this, however, may result in emission that does not meet the environmental protection agency (epa) standards. epa regulations limit sulfur dioxide discharge to 2000 parts per million per ton of cual burned and smoke discharge from the plant stacks to 20 ib per hour. the coop receives two grades of pulverized coal, c1 and c2, for use in the steam plant. the two grades are usually mixed together before burning. for simplicity, it can be assumed that the amount of sulfur pollutant discharged (in parts per million) is a weighted average of the proportion of each grade used in the mixture. the following data is based on the consumption of 1 ton per hr of each of the two coal grades. sulfur discharge smoke discharge steam generated coal grade in parts per million in ih per hour in ib per hour cl 1800 2.1 12,000 c2 2100 3 9,000 (a) determine the optimal ratio for mixing the two coal grades. (b) determine the effect of relaxing the smoke discharge limit by 1 ib on the amount of generated steam ner hour.
Mathematics
1 answer:
Ivenika [448]2 years ago
4 0
Go with whatever best for you
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HELP!!! PLEASE Jessica has already knitted 1 cm of scarf and can knit 2 cm each night. How many nights will Jessica have to spen
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Jessica will need to continue knitting for 4 nights.

9cm - 1cm = 8cm

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3 years ago
A car trip from New York to Cincinnati took 12.5 hours. The return trip by the same route took 1 hour longer because the average
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A car trip from New York to Cincinnati took 12.5 hours. The return trip by the same route took 1 hour longer.

Let x be the speed of the car

Car trip from New York to Cincinnati

We know Distance D = speed * time

time = 12.5 hours and speed =x

D = 12.5x

Return trip

The return trip by the same route took 1 hour longer. So 12.5+1 = 13.5 hours

he average rate of speed was 4 mph less. So speed is x-4

Distance D = speed * time

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D= 13.5x-54

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So we equate both the distance equations D= 13.5x-54  and D= 12.5x

12.5x = 13.5x-54    

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Distance D = 12.5x = 12.5 * 54=675 miles

The length of the route = 675 miles



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Answer:

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