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spayn [35]
3 years ago
13

Coal is carried from a mine in West Virginia to a power plant in New York in hopper cars on a long train. The automatic hopper c

ar loader is set to put 84 tons of coal into each car. The actual weights of coal loaded into each car are normally distributed, with mean μ = 84 tons and standard deviation σ = 0.7 ton. (a) What is the probability that one car chosen at random will have less than 83.5 tons of coal? (Round your answer to four decimal places.) (b) What is the probability that 29 cars chosen at random will have a mean load weight x of less than 83.5 tons of coal? (Round your answer to four decimal places.)

Mathematics
1 answer:
Alenkasestr [34]3 years ago
4 0

Step-by-step explanation:

this is the answer key for that question and etc...

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The Point Imperial is the highest point of the Grand Canyon and it is 8,800
Afina-wow [57]

Answer:

1222

Step-by-step explanation:

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2 years ago
At the bike shop x, it cost $2.75 per hour plus a $3.00 deposit to rent a bike.AT Bike shop z cost $1.75 per hour plus a $7.00 d
Alex_Xolod [135]

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A)

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B) to find when they will cost the same set the equations equal to each other and solve for n:

2.75n + 3.00 = 1.75n + 7.00

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6 0
3 years ago
What is the sum of<br> Σ4(0.5) -1,<br> n=1<br> O S=1.5<br> O S = 2<br> O S = 4.5<br> O S = 8
slamgirl [31]

Answer:

S=4.5

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3 0
2 years ago
2. Find the product.<br> 7.85 X 4.07 =
Novosadov [1.4K]

Answer:

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---------------=

31.9495

8 0
2 years ago
5 1/4 of what number is 42
amid [387]

Answer:

8

Step-by-step explanation:

5 1/4 =5.25

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4 0
3 years ago
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