a single number between 0 and 9 occurring either alone or in a larger number is called a _________

answer:

the first one and the last one

The correlation coefficient helps us to know how strong is the relation between two variables. The situations in which there exists a negative relationship are A and E.

The correlation coefficient helps us to know how strong is the relation between two variables. Its value is always between +1 to -1, where, the numerical value shows how strong is the relation between them and, the '+' or '-' sign shows whether the relationship is positive or negative.

A negative correlation is a relation in which as one variable increases the other decreases, therefore, there exists an inverse relationship between the two varibles.

A.) The number of calories consumed and the amount of weight lost by a person

It is known that if a person consumes more calories then he will gain more weight, therefore, the number of calories consumed and the amount of weight lost by a person have a negative correlation.

B.) The temperature outside and the number of pool guests.

If the temperature outside is more, more people will come to visit the pool. Thus, there exists a positive correlation.

C.) The number of children assigned to a class and the number of desks

The more the number of students, the more desk will be needed for them. Thus, there exists a positive correlation.

D.) The price of rice and the number of penguins at the South Pole.

The price of rice and the number of penguins at the south pole are two completely independent variables, therefore, there exists zero correlation.

E.)The thickness of the ice on a lake and the likelihood of falling through the ice.

If the thickness of the ice on a lake is more, there will be less likelihood of falling through the ice. Therefore, there exists a negative correlation.

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Answer:

Yes because 10 times 8 is 80.

Step-by-step explanation:

Answer: 80 IS a multiple of 10 because 8 times 10 is 80.

Step-by-step explanation:

Answer:

  0.80

Step-by-step explanation:

The z-score is found from the formula ...

  Z = (X -μ)/σ

  Z = (77 -73)/5 = 4/5 = 0.80

Jennifer's Z-score was 0.80.

Answer:

b) x > - 5

Step-by-step explanation:

x  >  - 5

x ∈ (- 5 ; + oo)

Answer:

B

Step-by-step explanation:

Edge2022

Answer:

It will take 36.1 years for her money to reach $105,000.

Step-by-step explanation:

The amount of money earned after t years in continuous interest is given by:

[tex]P(t) = P(0)e^{rt}[/tex]

In which P(0) is the initial investment and r is the interest rate, as a decimal.

Anna invests $7,000 in an account that compounds interest continuously and earns 7.5%.

This means that [tex]P(0) = 7000, r = 0.075[/tex]

How long will it take for her money to reach $105,000?

This is t for which P(t) = 105000.

[tex]P(t) = P(0)e^{rt}[/tex]

[tex]105000 = 7000e^{0.075t}[/tex]

[tex]e^{0.075t} = \frac{105000}{7000}[/tex]

[tex]e^{0.075t} = 15[/tex]

[tex]\ln{e^{0.075t}} = \ln{15}[/tex]

[tex]0.075t = \ln{15}[/tex]

[tex]t = \frac{\ln{15}}{0.075}[/tex]

[tex]t = 36.1[/tex]

It will take 36.1 years for her money to reach $105,000.

Answer:

D

Step-by-step explanation:

Because their slopes are equal. Rest of the step-by-step explanation is in the attached file!!

Answer:

C

Step-by-step explanation:

Option D is correct, There are two clusters, at 10 and 11, and at 13, 14, and 15.

Statistics is the discipline that concerns the collection, organization, analysis, interpretation, and presentation of data.

Data is a collection of discrete values that convey information, describing quantity, quality, fact, statistics, other basic units of meaning

Clustering is the task of dividing the population or data points into a number of groups such that data points in the same groups are more similar to other data points in the same group than those in other groups.

There are two clusters, at 10 and 11, and at 13, 14, and 15 is  best describes the clusters in the data set

Hence, Option D is correct, There are two clusters, at 10 and 11, and at 13, 14, and 15.

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Answer:6.3

Step-by-step explanation: 6.8 +1.5 -1.2 -0.8=6.3

The amount of flour left is 6.3 kg.

An expression is a way of writing a statement with more than two variables or numbers with operations such as addition, subtraction, multiplication, and division.

Example: 2 + 3x + 4y = 7 is an expression.

We have,

Total flour = 6.8 + 1.5 = 8.3 kg

Amount of flour used = 1.2 + 0.8 = 2 kg

The amount of flour left.

= 8.3 - 2

= 6.3 kg

Thus,

6.3 kg of flour is left.

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To determine the number of adult Americans needed for the distribution of the sample proportion to be approximately normal, we can use the formula n = (Z/E)^2 * p * (1-p).

To determine the number of adult Americans needed for the distribution of the sample proportion to be approximately normal, we need to calculate the minimum sample size n required. We can use the formula:

n = (Z₃/E)^2 * p * (1-p)

Where Z₃ is the critical value, E is the maximum error tolerance (which is half the width of the confidence interval), and p is the estimated proportion of adult Americans who support the changes.

For part (a), where 20% of all adult Americans support the changes, the estimated proportion p is 0.20. Plugging in the values for Z₃ and E, we can solve for n. Similarly, for part (b), where 25% of all adult Americans support the changes, the estimated proportion p is 0.25. Plugging in the values for Z₃ and E, we can solve for n.

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(a) The researcher needs to sample 15 more adult Americans if 20% support the changes.

(b) The researcher needs to sample 5 more adult Americans if 25% support the changes.

To determine how many more adult Americans the researcher needs to sample for the distribution of the sample proportion to be approximately normal, we need to use the Central Limit Theorem (CLT).

According to the CLT, the sampling distribution of the sample proportion [tex]\(\hat{p}\)[/tex] is approximately normal if both [tex]\(n \hat{p} \geq 10\)[/tex] and [tex]\(n (1 - \hat{p}) \geq 10\)[/tex], where n is the sample size and [tex]\(\hat{p}\)[/tex] is the sample proportion.

Let's find the required sample size for both cases:

Case (a): 20% of all adult Americans support the changes

Given [tex]\(\hat{p} = 0.20\),[/tex]

To ensure normality:

[tex]\[n \hat{p} \geq 10 \quad \text{and} \quad n (1 - \hat{p}) \geq 10\][/tex]

1. [tex]\( n \hat{p} \geq 10 \)[/tex]

  [tex]\[ n \times 0.20 \geq 10 \implies n \geq \frac{10}{0.20} = 50 \][/tex]

2. [tex]\( n (1 - \hat{p}) \geq 10 \)[/tex]

  [tex]\[ n \times 0.80 \geq 10 \implies n \geq \frac{10}{0.80} = 12.5 \][/tex]

The stricter condition is [tex]\( n \geq 50 \).[/tex]

Since the researcher already has a sample size of 35, the additional number of adults needed is:

[tex]\[50 - 35 = 15\][/tex]

Case (b): 25% of all adult Americans support the changes

Given [tex]\(\hat{p} = 0.25\),[/tex]

To ensure normality:

[tex]\[n \hat{p} \geq 10 \quad \text{and} \quad n (1 - \hat{p}) \geq 10\][/tex]

1. [tex]\( n \hat{p} \geq 10 \)[/tex]

  [tex]\[ n \times 0.25 \geq 10 \implies n \geq \frac{10}{0.25} = 40 \][/tex]

2. [tex]\( n (1 - \hat{p}) \geq 10 \)[/tex]

  [tex]\[ n \times 0.75 \geq 10 \implies n \geq \frac{10}{0.75} = 13.33 \][/tex]

The stricter condition is [tex]\( n \geq 40 \).[/tex]

Since the researcher already has a sample size of 35, the additional number of adults needed is:

[tex]\[40 - 35 = 5\][/tex]

Answer:

335 = 50 + 6p

Step-by-step explanation:

50 +6p=335

subtract from both sides

-50      -50

6p=285

/6p   /6p

divide both sides

p=47.5

Answer:

C

Step-by-step explanation:

A. 558 m2

B. 976 m2

C. 1,680 m2

D. 1,750 m2

Answer:

1064.64

Step-by-step explanation:

Answer:

90

Step-by-step explanation:

2*30= 60

3*30= 90

Answer:

86.64% probability that the resulting sample proportion is within .02 of the true proportion.

Step-by-step explanation:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the zscore of a measure X is given by:

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

For the sampling distribution of a sample proportion p in a sample of size n, we have that [tex]\mu = p, \sigma = \sqrt{\frac{p(1-p)}{n}}[/tex]

In this problem:

[tex]\mu = 0.2, \sigma = \sqrt{\frac{0.2*0.8}{900}} = 0.0133[/tex]

How likely is the resulting sample proportion to be within .02 of the true proportion (i.e., between .18 and .22)?

This is the pvalue of Z when X = 0.22 subtracted by the pvalue of Z when X = 0.18.

X = 0.22

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{0.22 - 0.2}{0.0133}[/tex]

[tex]Z = 1.5[/tex]

[tex]Z = 1.5[/tex] has a pvalue of 0.9332.

X = 0.18

[tex]Z = \frac{X - \mu}{\sigma}[/tex]

[tex]Z = \frac{0.18 - 0.2}{0.0133}[/tex]

[tex]Z = -1.5[/tex]

[tex]Z = -1.5[/tex] has a pvalue of 0.0668

0.9332 - 0.0668 = 0.8664

86.64% probability that the resulting sample proportion is within .02 of the true proportion.

Answer:

15.50=25.25

Step-by-step explanation:

15+0.50=15.50

25+0.25=25.25

So 15+0.50=25.25 = 9.75 because you subract 25.25-15.50=9.75

Hope this helps

Answer: The Sun is the major source of energy for organisms and the ecosystems of which they are a part. Producers such as plants, algae, and cyanobacteria use the energy from sunlight to make organic matter from carbon dioxide and water. This establishes the beginning of energy flow through almost all food webs.

Answer:

-5/4; -4/3

Step-by-step explanation:

12x^2 + 31x + 20 =

(4x + 5)(3x + 4) -->

x = -5/4 OR -4/3

Answer:

(a) The percentage of people having an IQ score between 67 and 133 is 99.73%.

(b) The percentage of people having an IQ score less than 89 or greater than 111 is 31.73%.

(c) The percentage of people having an IQ greater than 111 is 15.87%.

Step-by-step explanation:

The random variable X can be defined as the scores of an IQ test.

The random variable X is normally distributed with parameters μ = 100 and σ = 11.

(a)

Compute the probability of people who has an IQ score between 67 and 133 as follows:

[tex]P(67<X<133)=P(\frac{67-100}{11}<\frac{X-\mu}{\sigma}<\frac{133-100}{11})\\\\=P(-3<Z<3)\\\\=P(Z<3)-P(Z<-3)\\\\=0.99865-0.00135\\\\=0.9973[/tex]

The percentage is, 0.9973 × 100 = 99.73%.

Thus, the percentage of people having an IQ score between 67 and 133 is 99.73%.

(b)

Compute the probability of people having an IQ score less than 89 or greater than 111​ as follows:

[tex]P(X<89\ \cup\ X>111)=1-P(89<X<111)\\\\=1-P(\frac{89-100}{11}<\frac{X-\mu}{\sigma}<\frac{111-100}{11})\\\\=1-P(-1<Z<1)\\\\=1-[P(Z<1)-P(Z<-1)]\\\\=1-[0.84134-0.15866]\\\\=0.31732\\\\\approx 0.3173[/tex]

The percentage is, 0.3173 × 100 = 31.73%.

Thus, the percentage of people having an IQ score less than 89 or greater than 111 is 31.73%.

(c)

Compute the probability of people having an IQ score greater than 111​ as follows:

[tex]P(X>111)=P(\frac{X-\mu}{\sigma}>\frac{111-100}{11})\\\\=P(Z>1)\\\\=1-P(Z<1)\\\\=1-0.84134\\\\=0.15866\\\\\approx 0.1587[/tex]

The percentage is, 0.1587 × 100 = 15.87%.

Thus, the percentage of people having an IQ greater than 111 is 15.87%.

The % of people having an IQ score between the 67 and the 133 is 99.73%. The % of people having an IQ score less than the 89 or greater than 111 is 31.73%. The % of people having an IQ greater than 111 is 15.87%.

As per the IQ test which is done to check the intelligent quotient of  a score that s derived from a standard sets of tests. They are made to test human intelligence. The IQ score falls in a bell-shaped curve with the distortion of 100 and  SD of 11.

The percentage of the people having a score between the 67 and 133 was 099.7% and those between the 89 of more 111 is 31.7% and those having a greater IQ of 111 are 15.8 % that is declining to the top.

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Answer:

  0.56 mg

Step-by-step explanation:

Put 6 where t is and do the arithmetic.

  M(6) = 50(e^(-0.75·6)) = 50e^-4.5 ≈ 0.56

Olivia will have about 0.56 mg of medication remaining in her blood.

Answer:

42 inches

By regulation it may be no more than 2.75 inches (7.0 cm) in diameter at the thickest part and no more than 42 inches (1.067 m) in length.

Step-by-step explanation:

baseball bat - is a smooth wooden or metal club used in the sport of baseball to hit the ball after it is thrown by the pitcher.

length- a measure of distance.

Answer:

30 inches

Step-by-step explanation:

Answer:

A number line going from negative 7 to negative 1. A closed circle is at negative 5. Everything to the right of the circle is shaded.

Step-by-step explanation:

-4.4 ≥ 1.6 x - 3.6

Solving for the value of x,

1.6 x ≤ -4.4 + 3.6

 1.6 x ≤ - 0.8

Dividing 1.6 from both sides to know value of x

x ≤ - 0.5

Answer:

the answer is a

Step-by-step explanation:

Edenuity

Answer: The new drawing would be larger than the first drawing.

Step-by-step explanation:

A scale factor greater that one is an enlargement, but one smaller than one is a reduction

The second drawing will be 5 times bigger than the first one.

You must specify the extent of the shape's enlargement when describing one.

The scale factor is the ratio of two dimensions such that one figure is large and another is small.

The scale factor is done due to the unpractical measurement of any figure.

Given in the first drawing scale factor is 1:60

So Andre takes 60 units as 1

For example, it is 60 inches to 1 inch.

In the second drawing, Andre took 1:12

So he took 12 units as 1

For example 12 inches to 1

Now multiply by 5 then 5:60

So 60 inches to 5 inches means the second drawing is 5 times bigger the first one.

Hence "The second drawing will be 5 times bigger than the first one".

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Answer:

Number of families that should be surveyed if one wants to be 90% sure of being able to estimate the true mean PSLT within 0.5 is at least 43.

Step-by-step explanation:

We are given that one wants to estimate the mean PSLT for the population of all families in New York City with gross incomes in the range $35.000 to $40.000.

If sigma equals 2.0, we have to find that how many families should be surveyed if one wants to be 90% sure of being able to estimate the true mean PSLT within 0.5.

Here, we will use the concept of Margin of error as the statement "true mean PSLT within 0.5" represents the margin of error we want.

SO, Margin of error formula is given by;

       Margin of error =  [tex]Z_(_\frac{\alpha}{2}_ ) \times \frac{\sigma}{\sqrt{n} }[/tex]

where, [tex]\alpha[/tex] = significance level = 10%

            [tex]\sigma[/tex] = standard deviation = 2.0

            n = number of families

Now, in the z table the critical value of x at 5% ( [tex]\frac{0.10}{2} = 0.05[/tex] ) level of significance is 1.645.

SO,        Margin of error =  [tex]Z_(_\frac{\alpha}{2}_ ) \times \frac{\sigma}{\sqrt{n} }[/tex]

                          0.5   =  [tex]1.645 \times \frac{2}{\sqrt{n} }[/tex]

                         [tex]\sqrt{n} =\frac{2\times 1.645 }{0.5}[/tex]

                         [tex]\sqrt{n} =6.58[/tex]

                           n  =  [tex]6.58^{2}[/tex]

                               = 43.3 ≈ 43

Therefore, number of families that should be surveyed if one wants to be 90% sure of being able to estimate the true mean PSLT within 0.5 is at least 43.

Final answer:

45 students need to make it to the boat to be rescued.

Explanation:

The question asks us to calculate how many students attended a field trip, given that 15% of the 300 students at a middle school attended.

Therefore, 45 students need to make it to the boat to be rescued.

Answer:

I mean I guess sure

Step-by-step explanation:

Anyway hope you have a good day!!

ig..

Answer:

(A)One-third(36)(7)= 84 cubic units

Step-by-step explanation:

Volume of a Pyramid = [tex]\frac{1}{3}X$Base Area X Height[/tex]

The base is a rectangle

Base Area = 9 X 4=36 Square Units

Height =7 Units

Therefore:

Volume  [tex]=\frac{1}{3}(36)(7)[/tex]

=84 Cubic Units

Answer:

Step-by-step explanation:

Answer:

9 boards

Step-by-step explanation:

2/3 of the porch= 6 boards

so to figure out how much one third of the porch needs you find half of what it takes to fill in 2/3 of the porch and you get 3.

so 3=1/3 of the porch

then you simply do 3times 3 or 3+3+3 and you get 9

so it takes 9 boards to fill the whole porch

Final answer:

To calculate the probability that both a seventh grader and an eighth grader selected at random are girls, multiply the probability of selecting a girl from each grade. For the seventh grade, it's 1/4, and for the eighth grade, it's 7/10. The overall probability of both being girls is therefore 7/40.

Explanation:

The question involves determining the probability that both students selected for a competition from different grades are girls. To find this, we need to consider the number of girls in each of the two grades separately.

In the seventh grade, there are 3 girls out of 12 students. So, the probability of selecting a girl from the seventh grade is 3/12, which simplifies to 1/4. In the eighth grade, there are 7 girls out of 10 students. Therefore, the probability of selecting a girl from the eighth grade is 7/10.

To find the overall probability of selecting girls from both grades, we multiply the probabilities of each event since they are independent: (1/4) * (7/10) = 7/40.

Thus, the probability that both selected students are girls is 7/40.

Answer:

The number of candies in the sixth jar is 42.

Step-by-step explanation:

Assume that there are x number of candies in each of the six jars.

⇒ After Alice moves half of the candies from the first jar to the second jar, the number of candies in the second jar is:

[tex]\text{Number of candies in the 2nd jar}=x+\fracx}{2}=\frac{3}{2}x[/tex]

⇒ After Boris moves half of the candies from the second jar to the third jar, the number of candies in the third jar is:

[tex]\text{Number of candies in the 3rd jar}=x+\frac{3x}{4}=\frac{7}{4}x[/tex]

⇒ After Clara moves half of the candies from the third jar to the fourth jar, the number of candies in the fourth jar is:

[tex]\text{Number of candies in the 4th jar}=x+\frac{7x}{4}=\frac{15}{8}x[/tex]

⇒ After Dara moves half of the candies from the fourth jar to the fifth jar, the number of candies in the fifth jar is:

[tex]\text{Number of candies in the 5th jar}=x+\frac{15x}{16}=\frac{31}{16}x[/tex]

⇒ After Ed moves half of the candies from the fifth jar to the sixth jar, the number of candies in the sixth jar is:

[tex]\text{Number of candies in the 6th jar}=x+\frac{31x}{32}=\frac{63}{32}x[/tex]

Now, it is provided that at the end, 30 candies are in the fourth jar.

Compute the value of x as follows:

[tex]\text{Number of candies in the 4th jar}=40\\\\\frac{15}{8}x=40\\\\x=\frac{40\times 8}{15}\\\\x=\frac{64}{3}[/tex]

Compute the number of candies in the sixth jar as follows:

[tex]\text{Number of candies in the 6th jar}=\frac{63}{32}x\\[/tex]

                                                    [tex]=\frac{63}{32}\times\frac{64}{3}\\\\=21\times2\\\\=42[/tex]

Thus, the number of candies in the sixth jar is 42.

There are now 33.75  candies in the sixth jar.

Let's denote:

-  x  as the initial number of candies in each jar.

After Alice moves half of the candies from the first jar to the second jar, the number of candies in the first jar becomes [tex]\( \frac{x}{2} \)[/tex], and the number of candies in the second jar becomes [tex]x + \frac{x}{2} = \frac{3x}{2} \)[/tex] .

After Boris moves half of the candies from the second jar to the third jar, the number of candies in the second jar becomes [tex]\( \frac{3x}{4} \)[/tex], and the number of candies in the third jar becomes  [tex]x + \frac{x}{2} = \frac{3x}{2} \)[/tex] .

After Clara moves half of the candies from the third jar to the fourth jar, the number of candies in the third jar becomes [tex]\( \frac{x}{2} \)[/tex], and the number of candies in the fourth jar becomes  [tex]x + \frac{x}{2} = \frac{3x}{2} \)[/tex] .

After Dara moves half of the candies from the fourth jar to the fifth jar, the number of candies in the fourth jar becomes  [tex]\( \frac{3x}{4} \)[/tex], and the number of candies in the fifth jar becomes [tex]\( \frac{3x}{4} + \frac{3x}{8} = \frac{9x}{8} \).[/tex]

Finally, after Ed moves half of the candies from the fifth jar to the sixth jar, the number of candies in the fifth jar becomes [tex]\( \frac{9x}{16} \)[/tex], and the number of candies in the sixth jar becomes [tex]\( \frac{9x}{16} + \frac{9x}{32} = \frac{27x}{32} \).[/tex]

Given that 30 candies are now in the fourth jar, we can set up the equation:

[tex]\[ \frac{3x}{4} = 30 \][/tex]

Solving for  x :

[tex]\[ x = \frac{4 \times 30}{3} = 40 \][/tex]

Now, we can find the number of candies in the sixth jar:

[tex]\[ \frac{27 \times 40}{32} = \frac{1080}{32} = 33.75 \][/tex]

So, there are now 33.75  candies in the sixth jar.

Answer:

28.27 cm^2 (2 decimal places)

Step-by-step explanation:

side of box = 24/4 = 6

diameter of coin would be 6 too

area of coin = pi x (6/2)^2 = 28.2743