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Lelu [443]
3 years ago
13

Help me plz !!!!!!!!!!!!

Mathematics
2 answers:
aksik [14]3 years ago
6 0
Volume = Length time width times height. You need only the width so you multiply the length times the height then divide it from the volume. 11 1/2 times 7 1/2 = 86.25. 258 3/4 or 258.75 divided by 86.25 equals 3.
The answer to your question here is 3

Westkost [7]3 years ago
4 0
I think it is rectangular prism
You might be interested in
what is the volume of the cone? use 3.14 for pi and round to the nearest hundredth. do not enter units​
Free_Kalibri [48]

Answer:

Volume = PI * radius^2 * height / 3

Volume = PI * 9^2 * 6 / 3

Volume = 3.14 * 162

Volume = 508.68

Source: http://www.1728.org/volcone.htm

Step-by-step explanation:

6 0
2 years ago
If you have 18 questions how many do you need to get right to have 50 percent correct
MrRa [10]
You would need exactly 9 correct questions to get a 50%.

We can find this by multiplying the total number of questions by the percentage we are looking for. 

18*50% = 9
5 0
3 years ago
Is the confidence interval affected by the fact that the data appear to be from a population that is not normally​ distributed?
sp2606 [1]

Answer:

D. No, because the sample size is large enough.

Step-by-step explanation:

The central limit theorem states that "if we have a population with mean μ and standard deviation σ and take sufficiently large random samples from the population with replacement, then the distribution of the sample means will be approximately normally distributed. This will hold true regardless of whether the source population is normal or skewed, provided the sample size is sufficiently large".

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

If the sample size is higher than 30, on this case the answer would be:

D. No, because the sample size is large enough.

And the reason is given by The Central Limit Theorem since states if the individual distribution is normal then the sampling distribution for the sample mean is also normal.

From the central limit theorem we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

If the sample size it's not large enough n<30, on that case the distribution would be not normal.

7 0
3 years ago
Which of the following is an equation of the line through (2,3) and (-1,-12)
ahrayia [7]

Answer:

y = 5x - 7

Step-by-step explanation:

Using the equation of a line with two points

y_2 - y_1 / x_2 - x_1 = y - y_1 / x - x_1

Giving two points

( -4 , 10)(16 , -2)

x_1 = -4

y_1 = 10

x_2 = 16

y_2 = -2

Using the above formula

y_2 - y_1 / x_2 - x_1 = y - y_1 / x - x_1

-12 - 3 / -1 - 2 = y - 3 / x - 2

-15/-3 = y - 3 /x - 2

Cross multiply

-15(x - 2) = -3(y - 3)

-15x + 30 = -3y + 9

-15x + 30 + 3y - 9 = 0

-15x +30 - 9 + 3y = 0

-15x + 21 + 3y = 0

3y = 15x - 21 ( following y = mx + C

Dividing through by 3 to find y

3y/3 = 15x -21 / 3

y = 15x - 21 / 3

We can still separate

y = 15x / 3 - 21/3

y = 5x - 7

Therefore, the equation of the line is

y = 5x - 7

6 0
2 years ago
Evaluate 13 - 0.75w + 8x when w = 12 and x = 1/2
sashaice [31]

Answer:

8

Step-by-step explanation:

13 - 0.75 (12) + 8 (0.5)

13 - 0.75 (12) + 4

13 - 9 + 4

4 + 4

8

3 0
3 years ago
Read 2 more answers
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