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3 years ago

Is or can math be a fundamental part of everything in the world?

Mathematics

1 answer:

Bezzdna [24]3 years ago

7 0

Answer:

It is a fundmental part of our world because without it we wouldn't be able to control what we spend and count prices ect.

Step-by-step explanation:

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Lelu [443]

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$area = DC \times EG$

$area = 27 \times 16$

$area = 432$

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5 0

3 years ago

One number is 3 times a first number. A third number is 100 more than the first number. If the sum of the three numbers is 510,

Brums [2.3K]

Answer:

Step-by-step explanation:

solve a + (3a) + (a + 100)=510

7 0

3 years ago

What is 4875 in expanded form

Rufina [12.5K]

4,875 in expanded form is 4,000 + 800 +70 + 5 = 4,875

3 0

3 years ago

Find 2/3 of 3/4 of 24

Aleksandr-060686 [28]

Answer:

the answer is 12 which is a whole number

Step-by-step explanation:

i just multiplied them into my phone calculator and got the answer then checked my work. i really hope this helps and don't mind to BRAINLIEST PLZ

4 0

2 years ago

If a manufacturer conducted a survey among randomly selected target market households and wanted to be 95% confident that the d

katen-ka-za [31]

Answer:

We need a sample size of least 119

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.

$\pi \pm z\sqrt{\frac{\pi(1-\pi)}{n}}$

In which

z is the zscore that has a pvalue of $1 - \frac{\alpha}{2}$ .

The margin of error is:

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

95% confidence level

So $\alpha = 0.05$ , z is the value of Z that has a pvalue of $1 - \frac{0.05}{2} = 0.975$ , so $Z = 1.96$ .

Sample size needed

At least n, in which n is found when $M = 0.09$

We don't know the proportion, so we use $\pi = 0.5$ , which is when we would need the largest sample size.

$M = z\sqrt{\frac{\pi(1-\pi)}{n}}$

$0.09 = 1.96\sqrt{\frac{0.5*0.5}{n}}$

$0.09\sqrt{n} = 1.96*0.5$

$\sqrt{n} = \frac{1.96*0.5}{0.09}$

$(\sqrt{n})^{2} = (\frac{1.96*0.5}{0.09})^{2}$

$n = 118.6$

Rounding up

We need a sample size of least 119

6 0

3 years ago