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sertanlavr [38]
3 years ago
15

Suppose that a customer service center claims that the telephone calls it recieves last 113 seconds on average, with a standard

deviation of 9 seconds. if you took a sample of 324 phone calls, which of the following mean times would be within the 95% confidence interval?
A. 116.5 seconds
B. 114.5 seconds
C. 113.5 seconds
D. 115.5 seconds
Mathematics
2 answers:
zimovet [89]3 years ago
8 0

Answer: 113.5 sec

Step-by-step explanation:

Apex 2019

atroni [7]3 years ago
3 0

Answer:

113.5 seconds

Step-by-step explanation:

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Simplify (2√27) x (3√32)
Kryger [21]

For this case we have the following expression:

(2 \sqrt {27}) (3 \sqrt {32})

We have to:

27: 3 * 3 * 3: 3 ^ 2 * 3\\32: 16 * 2: 4 ^ 2 * 2

Rewriting the expression and simplifying we have:

(2 \sqrt {3 ^ 2 * 3}) (3 \sqrt {4 ^ 2 * 2}) =\\(2 * 3 \sqrt {3}) (3 * 4 \sqrt {2}) =\\(6 \sqrt {3}) (12 \sqrt {2}) =\\72 \sqrt {3 * 2} =\\72 \sqrt {6}

Answer:

72 \sqrt {6}

5 0
3 years ago
Read 2 more answers
Write an expression that can be used in over a temperature from degrees Celsius see to degrees Fahrenheit and then use the expre
densk [106]

Answer:

25°C = 77 degree Fahrenheit.

Step-by-step explanation:

In this question we have to write the expression showing the relation between degree Celsius and degree Fahrenheit first.

C=\frac{5}{9}(F-32)  where C = degree centigrade and F = degree Fahrenheit

Although the question is not clear in the next part but assuming that we have to use this expression to convert 25°C to degree Fahrenheit,

We will plug in the value of C in the expression,

25=\frac{5}{9}(F-32)

F=(\frac{9}{5}\times 25)+32

F = 45 + 32

F = 77

Therefore, 25°C = 77 degree Fahrenheit will be the answer.

4 0
3 years ago
Seth has just decided to replace his computer. His old computer cost him $1,433 when he bought it exactly seven years ago. Seth
puteri [66]

Answer:

The answer is D

Step-by-step explanation:

The solution would be like this for this specific problem:

Cost of the computer:

i = 0.117 / 12 

i = 0.00975 

= monthly payment 

= (i * P * (1 + i)^n) / ((1 + i)^n - 1) 

= (0.00975 * $1433 * (1 + 0.00975)^30) / ((1 + 0.00975)^30 - 1) 

= $55.32 

Electricity cost:

= $0.79 * 365.25 * 7 

= $2019.83 

Electricity Percentage: 

= $2019.83 / ($2019.83 + $1659.60) 

= 54.89% 

Electricity: 

= ($0.79 * 365 * 5) + ($0.79 * 366 * 2) 

= $2020.03 

 

Electricity Percentage: 

= $2020.03 / ($2020.03 + $1659.60) 

= 54.898%

In total, the electricity made up 54.898% of the lifetime cost of the computer.

3 0
3 years ago
A 5-column table with 6 rows titled Number of cans collected. Column 1 has entries 7, 8, 10, 11, 11, 14. Column 2 has entries 16
Reika [66]
The mean is 20 and median is 20 the mode is 15 the range is 36 so that is your answer and hope this helps
5 0
2 years ago
before cam broke his right arm he was able to text 9 words per minute on his phone after he broke his arm he had to use his left
mojhsa [17]
He textes less because hes not useed to texting with that arm so it lot harder
3 0
2 years ago
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