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Sveta_85 [38]
4 years ago
14

NEED HELP NOW 100 POINTS WILL MARK BRAINLIEST ANSWER PLZ ANSWER ALL 5 PHOTOS!!!!!

Mathematics
2 answers:
Genrish500 [490]4 years ago
7 0

B

A

D

D

B

C

A

Are all the answers


lakkis [162]4 years ago
4 0
#41
We can break the arrow two separate parts. A rectangle and a triangle.
3*2=6 To find the height of the triangle, do 5-3=2.  The area of the triangle is 4*2=8
        Then, 8/2=4. 4+6=10
10 is the answer for #41
#42
The question asks for what goes into the cans. The calls for the volume of the cans.
Volume is the answer.
#43
Subtract 4 from the x of (8,5) 
(4,5) is your answer
#44
The answer is Do you want to play soccer next year. This is because the question asks for what sport they offer to have next year, not if you are good at a sport, ever played a specific sport, etc.
Do you want to play soccer next year is your answer.
#45
To find surface area is the find the area of all surfaces. All the squares are the same shape, and the side of each square is 24. 24*24=576.  We know there are 6 squares, so 576*6=3456
3456 is your answer.
#46
The question asks for the range. Range is the highest value from a set minus the lowest value of a set. In our case, 51 is the highest and 10 is the lowest. 51-10=41
41 is your answer
#47
The question asks for the mean. This is the average of all values. We add \frac{73+78+78+79+79+79+81+81+81+83+84+85}{12}=80.083333333...  The question asks for the closet value.
80 is our answer
#48
Last but not least...
The question asks for how many teachers have 5-14 years of teaching experience, inclusive. We use the values from the table to find our answer. 
8+4=12
12 is your solution.

~Hope I helped


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Suppose that a sample of size 100 is to be drawn from a population with standard deviation 10.
larisa86 [58]

Answer:

a) 68% probability that the sample mean will be within 1 of the value of μ.

b)

1)

Approximately 95% of the time, x will be within 2 of μ.

2)

Approximately 0.3% of the time, x will be farther than 3 from μ.

The last:

n = 40

n = 65

n = 130

n = 520

Step-by-step explanation:

To solve this problem, it is important to know two concepts: The Empirical Rule and the Central Limit Theorem.

Empirical Rule

The Empericial Rule states that, for a normally distributed random variable:

68% of the measures are within 1 standard deviation of the mean.

95% of the measuers are within 2 standard deviations of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

Central Limit Theorem

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, a large sample size, of at least 30, can be approximated to a normal distribution with mean \mu and standard deviation \frac{\sigma}{\sqrt{n}}.

Suppose that a sample of size 100 is to be drawn from a population with standard deviation 10.

So \sigma = 10, n = 100, s = \frac{10}{\sqrt{100}} = 1

(a) What is the probability that the sample mean will be within 1 of the value of μ?

Within 1 is within one standard deviation of the mean \mu.

So there is a 68% probability that the sample mean will be within 1 of the value of μ.

(b) For this example (n = 100, σ = 10), complete each of the following statements by computing the appropriate value. (Round the answers to the nearest whole number.)

(1) Approximately 95% of the time, x will be within___ of μ.

By the empirical rule, 95% of the measures are within 2 standard deviations of the mean. In our sample, the standard deviation is 1.

So

Approximately 95% of the time, x will be within 2 of μ.

(2) Approximately 0.3% of the time, x will be farther than___ from μ.

By the empirical rule, 99.7% of the measures are within 3 standard deviations of the mean. In the other 0.3% of the time, the measures are farther than 3 standard deviations of the mean. In our sample, the standard deviation is 1.

So:

Approximately 0.3% of the time, x will be farther than 3 from μ.

A random sample is selected from a population with mean μ = 100 and standard deviation σ = 10. For which of the sample sizes would it be reasonable to think that the xsampling distribution is approximately normal in shape? (Select all that apply.)

As we saw above, in the central Limit theorem, we should use a sample size of at least 30. So

n = 40

n = 65

n = 130

n = 520

7 0
3 years ago
A car dealer buys a new car for $24,500. The dealer then marks the car’s price up 27%.
Makovka662 [10]
That would be ....

$31,115.

24,500 x 27% (6,615)
8 0
3 years ago
Read 2 more answers
What is 2/7 and 4/28 with a common denominator
LekaFEV [45]
2/7 could be 8/28 giving you a common denominator.  Or you could have 4/14 and 2/14.
7 0
4 years ago
Read 2 more answers
A medical researcher tested a new treatment for poison ivy against the traditional ointment. He concluded that the new treatment
OverLord2011 [107]

Answer:

A p-value if 0.047(same as 4.7%) means there is a 4.7% chance that there is no difference in how effective the new treatment is.

Step-by-step explanation:

When we talk of a p-value, we are referring to a conditional probability. What it tells us is the probability of getting results which are at least as unusual as the observed statistics in a case where we are given that the null hypothesis is not false.

A p-value if 0.047(same as 4.7%) means there is a 4.7% chance that there is no difference in how effective the new treatment is.

So what this means is that, in this case it is better that more data is collected to enable us know how effective the new treatment is

5 0
3 years ago
What is a value of <br>-3+19​
natka813 [3]

Answer:

16

Step-by-step explanation:

19-3 =16

6 0
3 years ago
Read 2 more answers
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