Ask question

Ask question

All categories

3 years ago

13

Solve for x URGENTTT

1 answer:

brilliants [131]3 years ago

5 0

X=4

,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,

You might be interested in

Franchise Business Review stated over 50% of all food franchises earn a profit of less than $50,000 a year. In a sample of 130 c

nydimaria [60]

Answer:

We need a sample size of 564.

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 $1 - \frac{\alpha}{2}$ .

For this problem, we have that:

$\pi = \frac{81}{130} = 0.6231$

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 $Z = 1.96$ .

Based upon a 95% confidence interval with a desired margin of error of .04, determine a sample size for restaurants that earn less than $50,000 last year.

We need a sample size of n

n is found when $M = 0.04$

So

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

$0.04 = 1.96\sqrt{\frac{0.6231*0.3769}{n}}$

$0.04\sqrt{n} = 1.96\sqrt{0.6231*0.3769}$

$\sqrt{n} = \frac{1.96\sqrt{0.6231*0.3769}}{0.04}$

$(\sqrt{n})^{2} = (\frac{1.96\sqrt{0.6231*0.3769}}{0.04})^{2}$

$n = 563.8$

Rounding up

We need a sample size of 564.

4 0

3 years ago

Common core answer for sum of 5x23x2

Serga [27]

230 is the answer
can you mark me as brainliest?

3 0

3 years ago

R/7.1 = 4.2<br><br>what is r =

MissTica

Answer:

r =29.82

Step-by-step explanation:

r/7.1 = 4.2

Multiply each side by 7.1

r/7.1 *7.1 = 4.2*7.1

r =29.82

8 0

3 years ago

64 mi/h to ft/s HELP HELP HELP HELP NOW!!!! WILL PUT 5 STARS AND MARK BRAINLIEST!!!

Sergeeva-Olga [200]

Answer:

Multiply 64 x 5280

Step-by-step explanation:

You will get your answer
h
e
l
l
o

5 0

4 years ago

Can someone help me with this question I'll give brainliest answer to whoever helps.

guapka [62]

Answer: B) It represents the product of two irrational numbers and is equivalent to an irrational number.

Step-by-step explanation:

1. By a definition an irrational number cannot be written as a simple fraction.

2. Keeping this information on mind:

$\sqrt{3}=1.73$ (Cannot be written as a simple fraction. It is an irrational number).

$\sqrt{2}=1.41$ (Cannot be written as a simple fraction. It is an irrational number).

3. When you multiply this irrational number, you obtain:

$\sqrt{3}*\sqrt{2}=\sqrt{6}$

4. $\sqrt{6}=2.44$ is an irrational number.

5. Therefore, the answer is the option B,

7 0

3 years ago