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madam [21]
3 years ago
6

The possibility of a power outage seems to grow every year because of demand and aging infrastructure. What can/should companies

do to mitigate this risk?
Mathematics
1 answer:
Leokris [45]3 years ago
8 0
Girls are a waste of sperm
You might be interested in
987mm is equal to how many cm (show work)
serg [7]
1 cm = 10 mm
? cm = 987 mm

987/10 = ? cm = 98.7 cm.

There are 98.7 cm in 987 mm.
5 0
3 years ago
Read 2 more answers
I need this quickly please
IRINA_888 [86]

Answer:

y = 15x + 20 or 15x - y + 20 = 0

x = 11

Step-by-step explanation:

Line is passing through the points (0, 20) & (2, 50)

Slope of line = (50 - 20)/(2 - 0) = 30/2 = 15

Equation of line

y - 20 = 15(x - 0)

y - 20 = 15x

y = 15x + 20 or 15x - y + 20 = 0

Plug y = 185 in above equation, we find:

185 = 15x + 20

185 - 20 = 15x

165 = 15x

x = 165/15

x = 11

5 0
2 years ago
Which expression represents a negative number? A.-4.5x-22.1 B.4.5x22.1 C.-45x2.21 D.-45x-2.21
nekit [7.7K]

Hey there!

-4.5 * (-22.1)

= -4.5(-22.1)

= 99.45


4.5 * 22.1 
= 99.45


-45 * 2.21

= -99.45

-45(2.21)

= -99


Therefore, your answer is:

Option C.


Good luck on your assignment & enjoy your day!


~Amphitrite1040:)


6 0
2 years ago
Of the 10 people attending a seminar, 2 have red hair.
kari74 [83]

Answer:

20%

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
A Statistics professor has observed that for several years students score an average of 106 points out of 150 on the semester ex
tekilochka [14]

Answer:

Step-by-step explanation:

We would set up the hypothesis test. This is a test of a single population mean since we are dealing with mean

For the null hypothesis,

µ = 106

For the alternative hypothesis,

µ > 106

It is a right tailed test because of >.

Since no population standard deviation is given, the distribution is a student's t.

Since n = 241,

Degrees of freedom, df = n - 1 = 241 - 1 = 240

t = (x - µ)/(s/√n)

Where

x = sample mean = 109

µ = population mean = 106

s = samples standard deviation = 8.3

a) test statistic, t = (109 - 106)/(8.3/√241) = 5.61

We would determine the p value using the t test calculator. It becomes

p = 0.00001

Since alpha, 0.05 > than the p value, 0.00001, then we would reject the null hypothesis. Therefore, At a 5% level of significance, this improvement seem to be practically​significant.

b) Confidence interval is written in the form,

(Sample mean - margin of error, sample mean + margin of error)

The sample mean, x is the point estimate for the population mean.

Margin of error = z × s/√n

Where

s = sample standard deviation

n = number of samples

From the information given, the population standard deviation is unknown, hence, we would use the t distribution to find the z score

df = 240

Since confidence level = 95% = 0.95, α = 1 - CL = 1 – 0.95 = 0.05

α/2 = 0.05/2 = 0.025

the area to the right of z0.025 is 0.025 and the area to the left of z0.025 is 1 - 0.025 = 0.975

Looking at the t distribution table,

z = 1.6512

Margin of error = 1.6512 × 8.3/√241

= 0.88

Confidence interval = 109 ± 0.88

7 0
3 years ago
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