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Vitek1552 [10]
3 years ago
14

10 is 40 percent of what number?

Mathematics
1 answer:
pychu [463]3 years ago
3 0
The answer should be 25
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A police officer would like to estimate the proportion of petty theft cases that have gone unsolved in a large city. He takes a
nata0808 [166]

Answer:

0.625 \pm 1.645*0.0571

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

\pi is the estimate

z is the zscore that has a pvalue of 1 - \frac{\alpha}{2}, also called the critical value.

The standard error is:

s = \sqrt{\frac{\pi(1-\pi)}{n}}

90% confidence level critical value

So \alpha = 0.1, z is the value of Z that has a pvalue of 1 - \frac{0.1}{2} = 0.955, so z = 1.645.

Estimate:

72 petty theft cases and finds 45 of these have gone unsolved.

So \pi = \frac{45}{72} = 0.625

Standard error:

s = \sqrt{\frac{\pi(1-\pi)}{n}} = \sqrt{\frac{0.625*0.375}{72}} = 0.0571

Answer:

0.625 \pm 1.645*0.0571

7 0
3 years ago
A square pyramid is shown below:
padilas [110]

Answer:

8.01 Is the answer your welcome

3 0
3 years ago
Jackson played a video game for 1/6 for hour. Hailey played a video game for 1/3 hour. Who played the video game for a greater a
viva [34]

Answer:

hailey played the game longer (1/3 hour).

Step-by-step explanation:

You are deciding which is greater: 1/6 or 1/3.in this case, a smaller denominator (such as 3) produces a greater value.1/3 has a smaller denom. than does 1/6, so 1/3 is greater than 1/6.hailey played the game longer (1/3 hour).

5 0
3 years ago
Find the simple interest on 500 at 6% for 1 year
ololo11 [35]

Answer:

Interest = $30

Step-by-step explanation:

Formula:

I = prt or I = p · r · t

So:

I = p r t

I = ($500)(.06)(1) <--- Just multiply all of these numbers and you get the final answer of:

Interest = $30.00 or just $30

8 0
3 years ago
Some people advise that in very cold​ weather, you should keep the gas tank in your car more than half full. Lou​'s car had 6.8
Katen [24]

Answer: You have the following information given in the problem above:

- Lou filled the tank with gas that cost ​$3.80 per gallon.

-   Lou​'s car had 5.9 gallons in the 13​-gallon tank.

2. Therefore, if he filled the tank, you can calculate the total amount of money Lou spent, by subtracting 13 gallons and 5.9 gallons and multiplying the result by ​$3.80.

3. Then, the result is:

$26.98

4 0
3 years ago
Read 2 more answers
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