All categories

3 years ago

3. What is the area of the triangle shown below? [= 25 m 140° a =40 m B

Mathematics

1 answer:

damaskus [11]3 years ago

4 0

Answer:

U did not provide answers

Step-by-step explanation:

You might be interested in

Graph both functions to find the solution(s) to the system.

konstantin123 [22]

graphed it with desmos (free as app and website).

the solutions are in the screenshot

(1, 3)

(3, 7)

5 0

3 years ago

Brainliest to first correct answer. Need halp with 3 and 4 plz

Dahasolnce [82]

Answer:

neither a relation or function (for both 3 and 4)

Step-by-step explanation:

5 0

3 years ago

A news station would like to conduct an exit poll to determine the likelihood that a highly debated amendment will receive enoug

vladimir1956 [14]

Answer:

The expression is $n = (\frac{1.645*0.5}{0.03})^2$

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 z-score that has a p-value of $1 - \frac{\alpha}{2}$ .

The margin of error is of:

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

90% confidence level

So $\alpha = 0.1$ , z is the value of Z that has a p-value of $1 - \frac{0.1}{2} = 0.95$ , so $Z = 1.645$ .

What expression would give the smallest sample size that will result in a margin of error of no more than 3 percentage points?

We have to find n for which M = 0.03.

We have no prior estimate for the proportion, so we use $\pi = 0.5$ . So

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

$0.03 = 1.645\sqrt{\frac{0.5*0.5}{n}}$

$0.03\sqrt{n} = 1.645*0.5$

$\sqrt{n} = \frac{1.645*0.5}{0.03}$

$(\sqrt{n})^2 = (\frac{1.645*0.5}{0.03})^2$

$n = (\frac{1.645*0.5}{0.03})^2$

The expression is $n = (\frac{1.645*0.5}{0.03})^2$

3 0

3 years ago

The histogram shows the number of morning customers who visited North Cafe and South Cafe over a one-month period. What is the b

astra-53 [7]

Answer:

1) Mean 2) Standard deviation 3) symmetric

Step-by-step explanation:

6 0

3 years ago

Read 2 more answers

What would the answer be

34kurt

Answer:

to break its contract with the federal government

Step-by-step explanation:

8 0

3 years ago