Which statement best discribe 3×8=8×3

If s = 1 over 4 unit and A = 16s2, what is the value of A, in square units? ____ square unit(s). (Input whole number only.)

Arada [10]

Pretty sure its 1. But don't be mad at me if it's wrong. Also, is that an online you are taking? I hope you aren't cheating. :)

6 0

4 years ago

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The profit earned by selling a quantity of x + 2 of a product is given by the expression x4 − x3 − 24. What is the average profi

Agata [3.3K]

the profit is a polynomial function :
p(x) = x^4 − x^3 − 24
the average profit per unit of product sold is :
ap(x) = (x^4 − x^3 − 24)/(x+2)

now,
(-2) is an "obvious" zero of p(x)
therefore : p(x) is dividable by (x+2)
and
the long division of p(x) by (x+2) gives :

Answer:
ap(x) = x^3 - 3x^2 + 6x - 12

8 0

4 years ago

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1. A poll conducted in 2018 found that 54% of US adult Twitter users get at least some news on Twitter. The standard error for t

Harrizon [31]

Answer:

The 99% confidence interval for the fraction of US adult Twitter users who get some news on Twitter is (0.4872, 0.6018). It means that we are 99% sure that the true proportion of US adult Twitter users who get some news on Twitter is between 0.4872 and 0.6018.

Step-by-step explanation:

In a sample with a number n of people surveyed with a probability of a success of $\pi$ , and a confidence level of $1-\alpha$ , we have the following confidence interval of proportions.

$\pi \pm zs$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ , and s is the standard error.

54% of US adult Twitter users get at least some news on Twitter.

This means that $\pi = 0.54$

The standard error for this estimate was 2.4%

This means that $s = 0.024$

99% confidence level

So $\alpha = 0.01$ , z is the value of Z that has a pvalue of $1 - \frac{0.01}{2} = 0.995$ , so $Z = 2.575$

The lower bound is:

$\pi - zs = 0.54 - 2.575*0.024 = 0.4782$

The upper bound is:

$\pi + zs = 0.54 + 2.575*0.024 = 0.6018$

The 99% confidence interval for the fraction of US adult Twitter users who get some news on Twitter is (0.4872, 0.6018). It means that we are 99% sure that the true proportion of US adult Twitter users who get some news on Twitter is between 0.4872 and 0.6018.

7 0

3 years ago

On a coordinate plane, triangle A B C has points (1, negative 2), (4, negative 2), (3, 1).

Phoenix [80]

Answer:

(-3, -1)

Step-by-step explanation:

(-3, -1) is the inverse of (3, 1)

3 0

3 years ago

Convert 3.55 grams potassium to atoms

vampirchik [111]

<span>Firstly, you'll need to convert the grams into number of mols. Since no. of mol = mass/molecular weight3.55/39.1 = 0.09079 mol because 1 mol of potassium ...</span><span>
</span>

6 0

3 years ago