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3 years ago

IM GIVING BRAINLIEST

Mathematics

1 answer:

pychu [463]3 years ago

3 0

See Below (Process and answer)

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At a local department store, skirts typically cost $15. However, due to a special, the

Strike441 [17]

Answer: 20%

Step-by-step explanation:

(part / whole) * 100

(3 / 15) * 100 = 20%

4 0

3 years ago

An article presents voltage measurements for a sample of 66 industrial networks in Estonia. Assume the rated voltage for these n

kramer

Answer:

We accept the null hypothesis and conclude that voltage for these networks is 232 V.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 232 V

Sample mean, $\bar{x}$ = 231.5 V

Sample size, n = 66

Sample standard deviation, s = 2.19 V

Alpha, α = 0.05

First, we design the null and the alternate hypothesis

$H_{0}: \mu = 232\\H_A: \mu \neq 232$

We use Two-tailed t test to perform this hypothesis.

Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{\sigma}{\sqrt{n-1}} }$ Putting all the values, we have

$t_{stat} = \displaystyle\frac{231.5- 232}{\frac{2.19}{\sqrt{66}} } = -1.8548$

Now,

$t_{critical} \text{ at 0.05 level of significance, 9 degree of freedom } = \pm 1.9971$

Since,

$|t_{stat}| > |t_{critical}|$

We accept the null hypothesis and conclude that voltage for these networks is 232 V.

4 0

3 years ago

Pleaseeeee helppp me quick

Mamont248 [21]

Answer:

-2 x -3/2

Step-by-step explanation:

-2 x -3/2

That would equal three, which is more than 2.

Hope that helps! :)

-Aphrodite

7 0

3 years ago

If i am making $4 billion / sec then how much money would i have in 10 minutes? if i am making $6 billion / sec then how much mo

Ghella [55]

If you are making 4 billion a second do 4,000,000,000 x 60 = 240,000,000,000
Then times that by 10 which equals. 2,400,000,000,000

Is the answer for the second one
6,000,000,000 x 60 x 60 x 2 = 1,296,000,000,000,000

3 0

3 years ago

A56-inch board is to be cut into three pieces so that the second piece is 3 times as long as the first piece and the third piece

nasty-shy [4]

Answer:

Here ANSWER

X+2x+5x = 56. Divide 56 by 8 to get 7 = x. First=7. Second=14, third=35

Step-by-step explanation:

5 0

3 years ago