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3 years ago

MATH HELP!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Mathematics

1 answer:

densk [106]3 years ago

8 0

Hi!

I think it's experimental probability, because you are actually experimenting to see how many times will the occasion occur.

Hope this helps!

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Helena wants to paint a box in the shape of a cube with sides that are 18 inches long. what is the surface area that Helena will

padilas [110]

Answer:

1944 inche^2

Step-by-step explanation:

18*18 = 324 each face

324*6 = 1944

7 0

3 years ago

What is the equation of the line that passes through (4,3) and (2, -1)?

jeka94

Answer:

y = 2x - 5

Step-by-step explanation:

Step 1: Find slope <em>m</em>

m = (-1 - 3)/(2 - 4)

m = -4/-2

m = 2

y = 2x + b

Step 2: Find <em>b</em>

-1 = 2(2) + b

-1 = 4 + b

b = -5

Step 3: Rewrite equation

y = 2x - 5

4 0

4 years ago

Help me find the slope please

Gelneren [198K]

Pick two points
(2, 18) and (4,21)
(21-18)/(4-2) = 3/2
The slope is 3/2

8 0

3 years ago

Any help please I’m kinda lost

4vir4ik [10]

Answer:

371/1000

Step-by-step explanation:

The answer is 1000

8 0

3 years ago

Suppose it is known that 8 out of the 20 teams in the sample had a season winning percentage better than 0.500.

Ganezh [65]

Answer:

The 95% confidence interval for the true proportion of all teams that had a season winning percentage better than 0.500 is (0.1853, 0.6147).

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 interval $1-\alpha$ , 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:

8 out of the 20 teams in the sample had a season winning percentage better than 0.500. This means that $n = 20, \pi = \frac{8}{20} = 0.4$ .

95% confidence interval

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

The lower limit of this interval is:

$\pi - z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4 - 1.96\sqrt{\frac{0.6*0.4}{20}} = 0.1853$

The upper limit of this interval is:

$\pi + z\sqrt{\frac{\pi(1-\pi)}{n}} = 0.4 + 1.96\sqrt{\frac{0.6*0.4}{20}} = 0.6147$

The 95% confidence interval for the true proportion of all teams that had a season winning percentage better than 0.500 is (0.1853, 0.6147).

3 0

4 years ago