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3 years ago

Which number belongs in the set of whole numbers on the Venn diagram? A) −18 B) −1 C) 2 D) 9.5

Mathematics

2 answers:

anastassius [24]3 years ago

8 0

Answer:

Step-by-step explanation:

9.5 is a decimal number

-1 is a negative number

same for -18

Elena-2011 [213]3 years ago

5 0

Answer:

The Answer is C

Step-by-step explanation:

Because 2D is a Whole Number and 18B is too big. Can I please have Brainlest

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Answer:

The 98% confidence interval for the mean usage in the March quarter of 2006, in kWh, was (333.87, 416.13).

Step-by-step explanation:

We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.

The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So

df = 30 - 1 = 29

98% confidence interval

Now, we have to find a value of T, which is found looking at the t table, with 29 degrees of freedom(y-axis) and a confidence level of $1 - \frac{1 - 0.98}{2} = 0.99$ . So we have T = 2.462

The margin of error is:

$M = T\frac{s}{\sqrt{n}} = 2.462\frac{91.5}{\sqrt{30}} = 41.13$

In which s is the standard deviation of the sample and n is the size of the sample.

The lower end of the interval is the sample mean subtracted by M. So it is 375 - 41.13 = 333.87 kWh

The upper end of the interval is the sample mean added to M. So it is 375 + 41.13 = 416.13 kWh

The 98% confidence interval for the mean usage in the March quarter of 2006, in kWh, was (333.87, 416.13).

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3 years ago

Two trains leave towns 664 miles apart at the same time and travel toward each other. One train travels 16 mih faster than the o

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I think that I am right. One train is traveling at 75 mph and the other train is traveling at 91 mph

Step-by-step explanation:

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2 years ago

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the width of a rectangle is 8 feet and the diagnal length of the rectangle is 13 feet which measurement is closest to the length

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Answer:

Well the whole answer is 10.246950 smth smth but I don’t have the multiple choices so your gonna have to round yourself

Step-by-step explanation:

Okay so you have a weigh of 8 and a diagonal of 13.

If you look, theres a triangle there. One side has 8 and the diagonal that was cut forms a 13. So we have a leg and a hypotnuse. To find the other leg (length) just follow the Pythagorean theroum and solve for b or a.

Pythagorean theroum: a^2+b^2=c^2

Now subsitute c for 13 since its the hypotnuse and a or b as 8 but only one.

In this case I’m substituting a for 8.

8^2+b^2=13^2

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Now square root 105

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2 years ago