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-BARSIC- [3]
3 years ago
10

A total of 9 cycles have been observed during a time study. The mean for the largest element time = 0.80 min, and the correspond

ing sample standard deviation s = 0.15 min, which was also the largest. If the analyst wants to be 95% confident that the mean of the sample was within +/- 10% of the true mean, how many more observations should be taken?
Mathematics
1 answer:
aliya0001 [1]3 years ago
5 0

Answer:

Only one, more should be taken.

Step-by-step explanation:

See the attached file please.

Download pdf
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Which of the following correctly completes the square for the equation
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Answer:

A. (x + 2)^2 = 31.

Step-by-step explanation:

x^2 + 4x = 27

x^2 + 4x - 27 = 0

A. (x + 2)^2 = 31

x^2 + 4x + 4 - 31 = 0

x^2 + 4x - 27 = 0

This option corresponds to the given equation, so it is correct.

B. (x + 2)^2 = 43

x^2 + 4x + 4 - 43 = 0

x^2 + 4x - 39 = 0

This does not correspond to the equation.

C. (x + 4)^2 = 31

x^2 + 8x + 16 - 31 = 0

x^2 + 8x - 15 = 0

This does not correspond to the equation.

D. (x+4)^2 = 43

x^2 + 8x + 16 - 43 = 0

x^2 + 8x - 27 = 0

This does not correspond to the equation.

So, your answer is A. (x + 2)^2 = 31.

Make sure to SUBMIT and check your PREVIOUS answers to make sure they are right! XD Also, hope this helps!

7 0
3 years ago
At the grocery store there are two different options for buying Coke. You can buy a 12 pack for $5.49 or an 18 pack for $8.59. W
baherus [9]

Step-by-step explanation:

The 18 Pack why is because it has more Coke than the other one and it is less expensive than the other one if it had 18.

3 0
2 years ago
Vector component of ū and w are as
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Answer:

r = ( -14.4 , 6.47 )

Step-by-step explanation:

in the photo you will find all the steps

7 0
2 years ago
A dive ring is 10 feet below the surface of the water in a pool.
USPshnik [31]
100feet below is your answer I think
6 0
2 years ago
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Which of the following functions is graphed below
Lelechka [254]

Calculate the function values for x = 2

y=x^2+4\\\\for\ x=2\to y=2^2+4=4+4=8\to(2,\ 8)\\\\y=-x+4\\\\for\ x=2\to y=-2+4=2\to(2,\ 2)

Look at the picture.

Answer:

C.\ \left\{\begin{array}{ccc}x^2+4&.\ x

5 0
3 years ago
Read 2 more answers
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