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REY [17]
3 years ago
5

A physicist examines 10 water samples for iron concentration. The mean iron concentration for the sample data is 0.711 cc/cubic

meter with a standard deviation of 0.0816. Determine the 90% confidence interval for the population mean iron concentration. Assume the population is approximately normal.
Step 1 of 2: Find the critical value that should be used in constructing the confidence interval. Round your answer to three decimal places.
Step 2 of 2: Construct the 90% confidence interval. Round your answer to three decimal places. Lower endpoint? Upper endpoint?
Mathematics
1 answer:
leonid [27]3 years ago
5 0

Answer:

Poggers

Step-by-step explanation:

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A cylinder. The diameter of the base is 5 feet and the height of the cylinder is 12 feet.
MaRussiya [10]

Answer:

235.5 ft³

Step-by-step explanation:

V = Ab×h

= πr²×h

= π(2.5)²×12

= 3.14×6.25×12

= 235.5 ft³

6 0
3 years ago
Segment AB falis on line 6x + 3y = 9. Segment CD falls on line 4x + 2y = 8. What is true about segments AB and CD?
Illusion [34]

Answer:

Hence, the correct option is;

They are parallel because they have the same slope of -2

Step-by-step explanation:

Here we have;

AB falls on the line 6x + 3y = 9..........................(1)

CD falls on the line 4x + 2y = 8..........................(2)

Therefore, for equation (1),

3y = 9 - 6x which gives;

y = -2x + 3

for equation (2),

2y = 8 - 4x which gives;

y = -2x + 4

The equation of a straight line is y = m·x + c

Where:

m = Slope

c = Intercept

Hence, since, by comparison to the equation of a straight line, both lines have the same slope of -2, but different intercept, we have that both lines are parallel

Hence, the correct option is;

They are parallel because they have the same slope of -2.

5 0
3 years ago
#13 please help solve this
rusak2 [61]

Answer:

The change in the total cost for each book printed is $10

The cost to get started is $1250

Step-by-step explanation:

In the linear equation y = m x + b, where

  • m is the rate of change per unit
  • b is the initial amount (value y at x = 0)

∵ y represents the total cost of publishing a book in dollars

∵ x represents the number of copies of the book printed

∵ y = 1250 + 10 x

- Compare it with the linear equation y = m x + b

∴ m = 10

∴ b = 1250

∵ m = Δy/Δx

- That means m is the change in the total cost per book

∴ The change in the total cost for each book printed is $10

∵ b is value y at x = 0

- That means b is the cost to get started before print any book)

∴ The cost to get started is $1250

5 0
4 years ago
What is 5/6 - 4/9 in Simplest form ?
kherson [118]

Answer:

is it multiple choice?

8 0
3 years ago
Please Hellppppppp!!!!
zubka84 [21]

Answer:

d, e, f would be the answer but wait for someone to double check me

8 0
3 years ago
Read 2 more answers
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