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3 years ago

(07.06) Which of the following graphs shows all the possible values for a number that is more than 8?

Mathematics

2 answers:

Julli [10]3 years ago

8 0

Answer: D

The open circle represents the solid "equal to" statement. Colored in circles represent "greater/less than or equal to."

natka813 [3]3 years ago

7 0

I believe the answer is D.

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As one once said Another one

aleksandrvk [35]

Answer:

Step-by-step explanation:

7 0

3 years ago

Read 2 more answers

In a sample of 60 electric motors, the average efficiency (in percent) was 85 and the standard deviation was 2. Section 05.01 Ex

jasenka [17]

Answer:

95% confidence interval for the mean efficiency is [84.483 , 85.517].

Step-by-step explanation:

We are given that in a sample of 60 electric motors, the average efficiency (in percent) was 85 and the standard deviation was 2.

So, the pivotal quantity for 95% confidence interval for the population mean efficiency is given by;

P.Q. = $\frac{\bar X - \mu}{\frac{s}{\sqrt{n} } }$ ~ $t_n_-_1$

where, $\mu$ = sample average efficiency = 85

$\sigma$ = sample standard deviation = 2

n = sample of motors = 60

$\mu$ = population mean efficiency

So, 95% confidence interval for the mean efficiency, $\mu$ is ;

P(-2.0009 < $t_5_9$ < 2.0009) = 0.95

P(-2.0009 < $\frac{\bar X - \mu}{\frac{s}{\sqrt{n} } }$ < 2.0009 ) = 0.95

P( $-2.0009 \times {\frac{s}{\sqrt{n} }$ < ${\bar X - \mu}$ < $2.0009 \times {\frac{s}{\sqrt{n} }$ ) = 0.95

P( $\bar X -2.0009 \times {\frac{s}{\sqrt{n} }$ < $\mu$ < $\bar X +2.0009 \times {\frac{s}{\sqrt{n} }$ ) = 0.95

95% confidence interval for $\mu$ = [ $\bar X -2.0009 \times {\frac{s}{\sqrt{n} }$ , $\bar X +2.0009 \times {\frac{s}{\sqrt{n} }$ ]

= [ $85 -2.0009 \times {\frac{2}{\sqrt{60} }$ , $85 +2.0009 \times {\frac{2}{\sqrt{60} }$ ]

= [84.483 , 85.517]

Therefore, 95% confidence interval for the population mean efficiency is [84.483 , 85.517].

8 0

3 years ago

How to do the equation for the sum of three consecutive integers is 467

Dvinal [7]

Call n, the first of those consecutive terms, then three consecutive terms are:n, n +1, and n +2.

So, the equation will be n + (n +1) + (n +2) = 467

=> n + n + 1 + n + 2 = 467

=> 3n + 3 = 467

All of them are valid forms of the equation for the sum of three consecutive integers is 467.

You can solve it now, if you want:

3n = 467 - 3

3n = 464

n = 464 / 3

n = 154.6

The solution means that there are not three consecutive numbers whose sume is 467.

You can verifiy that if you take 154 + 155 + 156 = 465

And 155 + 156 + 157 = 468

4 0

3 years ago

1.) Which of the following is closest to 1?

Vaselesa [24]

Answer:

Step-by-step explanation:

98% it is the only percent and it is close to one

4 0

3 years ago

Does the following set of measurements create a triangle? 17,35, and 18 True or False

Natasha_Volkova [10]

False, because a^2+b^2=c^2 and no matter what numbers substitute for which ever variable the answer isn’t going to be true