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grandymaker [24]
3 years ago
10

By careful reorganization, a company was able to reduce the cost of operation from $21,840 per month to $17,190 per month. By wh

at percent was the cost of operation reduced?
Mathematics
2 answers:
Ede4ka [16]3 years ago
4 0
Subtract the 17190 from the 21840. you get 4650. 4650 divided by 21840 is 0.21. The percent decrease is 21%
lesya692 [45]3 years ago
4 0

Answer: The cost of operation was reduced by 21.29%.

Step-by-step explanation:

Since we have given that

Cost of operation earlier = $21,840 per month

Cost of operation now = $17,190 per month

Difference between them is given by

$21,840 - $17,190

=$4,650

Percentage by which the cost of operation was reduced is given by

\dfrac{4650}{21840}\times 100\\\\=21.29\%

Hence, the cost of operation was reduced by 21.29%.

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Is three a solution of z^2 +1=4+3z?
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Answer:

no

Step-by-step explanation:

z^2 +1=4+3z

Substitute into the equation and see if it is true

3^2 +1 = 4+3(3)

9+1 = 4+9

10 = 13

This is not a true statement so this is not a solution

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3 years ago
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A grand piano can weighton. How many<br> ounces can a grand piano weigh?
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2 years ago
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3 years ago
A study of the career paths of hotel general managers sent questionnaires to an SRS of 280 hotels belonging to major U.S. hotel
const2013 [10]

Answer and Step-by-step explanation:

we have the following data:

Point estimate = sample mean = \ bar x = 12.39

Population standard deviation = \ sigma = 3.7

Sample size = n = 177

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α = 1 - 90%

alpha = 1 - 0.90 = 0.10

alpha / 2 = 0.05

Z \ alpha / 2 = Z0.05 = 1,645

Margin of error = E = Z \ alpha / 2 * (\ sigma / \ sqrtn)

we replace:

E = 1.645 * (3.7 / \ sqrt177)

Outcome:

E = 0.46

b) margin of error with a 99% confidence interval

α = 1-99%

alpha = 1 - 0.99 = 0.01

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