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3 years ago

To which subset(s) does the negative square root of 25 belong? choose all that apply

Mathematics

2 answers:

melomori [17]3 years ago

8 0

Answer:

-5 is an integer and also a rational number.

Step-by-step explanation:

Given is a value which is the negative square root of 25 belong.

First find out square root of 25 as

$\sqrt{25} =5\\-\sqrt{25}=-5$

We know that -5 is not a natural number or whole number since negative

But -5 is a rational number and also an integer

lozanna [386]3 years ago

5 0

$-\sqrt{25}$ which can be written as -sqrt(25) on a keyboard, can be simplified to -5 since the square root of 25 is 5.

Put another way, 5^2 = 25 so we're simply going in reverse.

So the question is: where does -5 belong? Which number set?

The answer is: the set of integers and rational numbers
So that's the two answers

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Extra Info:

The value -5 is not a natural number as the set of natural numbers is {1, 2, 3, 4, 5, ...} basically the set of counting numbers
The same story applies to the set of whole numbers which is {0, 1, 2, 3, ...}
So -5 is not in the set of whole numbers

The value -5 is also not irrational because it is rational. We can write it as a ratio of two integers: -5 = -5/1

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Answer:

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Step-by-step explanation:

This is a hypothesis test for the difference between populations means.

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Then, the null and alternative hypothesis are:

$H_0: \mu_1-\mu_2=0\\\\H_a:\mu_1-\mu_2< 0$

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The sample 1 (powder diet group), of size n1=49 has a mean of 42 and a standard deviation of 12.

The sample 2 (liquid diet group), of size n2=36 has a mean of 45 and a standard deviation of 14.

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The estimated standard error of the difference between means is computed using the formula:

$s_{M_d}=\sqrt{\dfrac{\sigma_1^2}{n_1}+\dfrac{\sigma_2^2}{n_2}}=\sqrt{\dfrac{12^2}{49}+\dfrac{14^2}{36}}\\\\\\s_{M_d}=\sqrt{2.939+5.444}=\sqrt{8.383}=2.895$

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3 years ago

Read 2 more answers

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miss Akunina [59]

Answer:

Step-by-step explanation:

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3 years ago

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Liono4ka [1.6K]

Answer:

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Step-by-step explanation:

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