you invested $20680 part of it in a stock that paid 12% annual interest. However the rest of the money suffered a 5% loss. if the total annual income from both investments was $2026 how much was invested at each rate?​

Answers

Answer 1
Let x be the investment made at 12% annual interest and y be the rest of the investment that suffered a loss of 5%.

The initial total investment is $8000.

x
+
y
=
8000


In a year, 0.12x was earned while 0.05 was lost. The net income for both is $620.

0.12
x

0.05
y
=
620
0.12
x

0.05
(
8000

x
)
=
620
[
Substitute y using the first equation
]
0.12
x

400
+
0.05
x
=
620
0.17
x

400
=
620
0.17
x
=
1020
[
Add 400 to both sides
]
x
=
6000
[
Divide both sides by 0.17
]


The remaining investment is:

y
=
8000

(
6000
)
[
Substitute x value
]
y
=
2000


$6000 was invested in a stock that paid 12% annual interest while $2000 was invested on another investment that suffered a loss.


Related Questions

Alice has shared that her RSA public key is n = 33, e = 7. Her private key is d = 3. She was sent the encrypted number 21. Decrypt the number.

Answers

Answer: The encrypted number is 25 and this can be determined by using the formula from RSA algorithm.

Given :

Alice has shared that her RSA public key is n = = 33, e = 7.

The formula from the RSA algorithm is used to encrypt the number 16. The formula is given by:

where e = 7, n = 33 and m = 16.

Now, substitute the known values in the above equation.

Now, by using the modulo function the above expression becomes:

c = 25

So, the encrypted number is 25.

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Step-by-step explanation:

Is this correct? Or no?

Answers

Answer:

No

Step-by-step explanation:

No, this is not correct. When you divide both sides of an inequality by a negative number, the inequality symbol must be reversed. So in this case, dividing both sides of the inequality -3x > 9 by -3 would give us x < -3, which is not what Diego claimed.

Question 6 A test of hypothesis was performed to determine, at 5% level of significance, if the majority of the engineering graduates pass the PE exam in their first try. If the computed value of the test statistic Z based on the sample information is z = 2.10, then the p-value for this test is: 0.00895 O 0.05 0.9821 None of these O 0.0179 N • Previous Not saved S

Answers

The p-value for the test is 0.9821.

What is hypothesis?

A statistical hypothesis test is a technique for determining if the available data are sufficient to support a specific hypothesis. We can make probabilistic claims regarding population parameters through hypothesis testing.

What is z-score?

You can plot a z-score on a normal distribution curve. The range of Z-scores ranges from -3 standard deviations (which would be on the far left of the normal distribution curve) to +3 standard deviations (which would fall to the far right of the normal distribution curve). You must be aware of the mean and population standard deviation in order to use a z-score.

Given that the test statistic Z based on the sample information is z = 2.10.

z = 2.1 + 0.00

From the z-score table the value of p is 0.9821.

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A group of 2342 students were surveyed about the courses they were taking at their college with the
following results:
1031 students said they were taking Dance.
1058 students said they were taking Science.
1059 students said they were taking English.
449 students said they were taking Science and Dance.
459 students said they were taking Science and English.
456 students said they were taking Dance and English.
218 students said they were taking all three courses.
Fill in the following Venn Diagram with the cardinality of each region then answer the questions
below.
Science
IV.
11.
VII.
V.
English
VI.
How many students took Science, Dance, or English?
How many students took Dance and English, but not Science?
How many students took Science or didn't take Dance?
How many students took none of the courses?
Dance
III.
How many students took Science or English, but not Dance?
VIII.

Answers

Hello,

I hope you and your family are doing well!

To find the number of students who took Science, Dance, or English, you can add the number of students in each individual category and then subtract the number of students who took all three courses, since those students were counted twice. This gives a total of 1031 + 1058 + 1059 - 218 = 3100 students.

To find the number of students who took Dance and English, but not Science, you can add the number of students in region VII and region VIII, which is 456 + 11 = 467 students.

To find the number of students who took Science or didn't take Dance, you can add the number of students in region I and region III, which is 1031 + 218 = 1249 students.

To find the number of students who took none of the courses, you can add the number of students in region II and region IV, which is 449 + 459 = 908 students.

To find the number of students who took Science or English, but not Dance, you can add the number of students in region V and region VI, which is 1059 + 459 = 1518 students.

----

Please consider leaving a Thanks and brainliest if you find this helpful.

Happy Holidays!

PLEASE HELP WILL GIVE 100 POINTS

Answers

Answer:

72y

Step-by-step explanation:

Perfect square monomials are in the form:

[tex]x^2+bx+\left(\dfrac{b}{2}\right)^2[/tex]

They factor as:

[tex]\left(x + \dfrac{b}{2}\right)^2[/tex]

To find the middle term of this polynomial, first factor 16 out of the expression.

[tex]16(y^2 \: + \: ?+5.0625)[/tex]

We know that the middle term will be in the form [tex]by[/tex], and the last term will be in the form [tex]\left(\dfrac{b}{2}\right)^2[/tex]. Using this information, we can solve for b.

[tex]5.0625 = \left(\dfrac{b}{2}\right)^2[/tex]

[tex]\sqrt{5.0625} = \dfrac{b}{2}\right[/tex]

[tex]4.5 = b[/tex]

Then, we can substitute that into the term [tex]by[/tex].

[tex]16(y^2 + 4.5y+5.0625)[/tex]

Finally, distribute the 16 and then take the middle term as the answer.

[tex]16y^2 + 72y+81[/tex]

72y

Answer:

72y or -72y

-----------------------------

We are given a binomial and need to add a monomial to make it a perfect square.

Recall the identities for a square of a sum or difference of two numbers:

(a ± b)² = a² ± 2ab + b²

Analyze the given and compare with the identity above:

16y² + ... + 81Here 16y² = (4y)² and 81 = 9², so a = 4y and b = 9.

To complete the square we need to add ± 2ab, which is:

± 2ab = ± 2(4y*9) = ± 72y

By adding this we get:

16y² + 72y + 81 = (4y + 9)²

or

16y² + (-72y) + 81 = (4y - 9)²

Let f (h) be the number of riders on a train h hours after 9 A.M. Explain the meaning of the
statement f (3) = 50.

Answers

Answer:

At 12:00 there were 50 riders

Step-by-step explanation:

3 hours after 9 would be noon.  At that time there are 50 riders

A random survey of 75 death row inmates revealed that the mean length of time on death row is 17.4 years with a standard deviation of 6.3 years. Conduct a hypothesis test to determine if the population mean time on death row could likely be 15 years. Is this a test of one mean or proportion? State the null and alternative hypotheses. H_o: H_a: Is this a right-tailed, left-tailed, or two-tailed test? What symbol represents the random variable for this test? In words, define the random variable for this test. Is the population standard deviation known and, if so. what is it? Calculate the following: Which test should be used? State the distribution to use for the hypothesis test. Find the p -value. Al a pre -conceived a = 0.05, what is your Decision: Reason for the decision: Conclusion (write out in a complete sentence):

Answers

The test is the test for a mean.The null hypothesis is of: [tex]H_0: \mu = 15[/tex]The alternative hypothesis is of: [tex]H_1: \mu \neq 15[/tex]The test is two-tailed.The symbol that represents the random variable for this test is of: [tex]\mu[/tex]The variable represents the mean time spent on the death row by the prisoners.The population standard deviation is not known.The test should be used is a two-tailed t-test.The distribution used is the t-distribution.The p-value for the test is of: 0.0015.The decision is of: Reject the null hypothesis.The conclusion is of: There is enough evidence that prisoners spend a time different of 15 years in the death row.

What are the hypothesis test?

At the null hypothesis, it is tested if the mean is of 15 years, that is:

[tex]H_0: \mu = 15[/tex]

At the alternative hypothesis, it is tested if the mean is different of 15 years, that is:

[tex]H_1: \mu \neq 15[/tex]

What is the test statistic?

The equation that gives the test statistic is defined as follows:

[tex]t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}[/tex]

In which:

[tex]\overline{x}[/tex] is the sample mean.[tex]\mu[/tex] is the value tested at the null hypothesis.s is the standard deviation of the sample.n is the sample size.

The values of these parameters in this problem are given as follows:

[tex]\overline{x} = 17.4, \mu = 15, s = 6.3, n = 75[/tex]

Hence the test statistic is of:

[tex]t = \frac{\overline{x} - \mu}{\frac{s}{\sqrt{n}}}[/tex]

[tex]t = \frac{17.4 - 15}{\frac{6.3}{\sqrt{75}}}[/tex]

t = 3.30.

What is the p-value?

Considering a two-tailed test, as we are testing if the mean is different of a value, with t = 3.30 and 75 - 1 = 74 df, the p-value of the test is of:

0.0015.

Since the p-value is less than the significance level of 0.05, the null hypothesis is rejected, meaning that there is enough evidence to conclude that prisoners spend a time different of 15 years in the death row.

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Solve
7) 6-4(6 n+7) ≥122

Answers

The solution of the given inequality 6 - 4( 6 n+7 )  ≥ 122 is given by

n ≤ -6.

As given in the question,

Given inequality is :

6 - 4( 6 n+7 )  ≥ 122

Open the parenthesis of the given inequality we get,

⇒ 6 - 24n - 28 ≥ 122

⇒ 6 - 28 -24n ≥ 122

⇒ -22 -24n ≥ 122

Add 22 on both the side of inequality we get,

⇒ -22 + 22 -24n ≥ 122 + 22

⇒ -24n ≥ 144

Divide both the side by ( -24 ) we get,

⇒ n ≤ -144/ 24

⇒ n ≤ -6.

This shows that n has all the less than or equal to -6.

Therefore, the solution of the given inequality is equal to n ≤ -6.

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Ben bought 20 shares of stock at $10.00 per share and sold them for $12.00 per share.
What was his ROI (Return on Investment)?

Answers

$40 you multiply 10 by 20 and 12 by 20 and subtract the 12 times 20 by 10 by 20 and you get 40

HELP PLEASE ASAP!!!
The entire graph of the function g is shown in the figure below. Write the domain and range of g as intervals or unions of intervals.

Answers

Answer:

D= [-4,-1) U (2,4)

R = [-3,5)

what is function for 3x-5

Answers

5/3 bc I hope this was what you were asking for if you need more help just say

Journalizing, adjusting, adjusted trial balance
Harrison’s Repair Service shows opening balance for some accounts on 01 January 20X1: Cash: $36,000; Accounts Receivable: 60,500; Prepaid Rent: $2,400; Supplies: $2,500; Equipment: $13,900; Accumulated depreciation - Equipment: $3,150; Accounts Payable: $2,780; Notes Payable: 16,000; Unearned service revenue: 6,120; Share capital: 86,915; Retained Earnings: 15,335; Dividends: 15,000.
The following transactions in January were:
January 1 Paid the monthly rental fee, $790.
1 Made the monthly payment to Apple Company, $1,700 in order to decrease Accounts
Payable.
6 Purchased additional repair supplies on credit from Pineapple Company, $1820.
15 Received cash for repair service performed, $2,950.
20 Paid cash for an advertisement in the local newspaper, $370.
23 Paid Pineapple Company on account, $1,200
30 Collected payment for repair fees earned, $7,460.
30 Recorded a dividend paid to stockholders, $8,100.
Required
A, Prepare journal entries to record the January transactions.
B, Using the following information, record adjusting entries in the general journal and prepare the T- accounts for all accounts
1. One month of rent has expired. The rental policy is valid in one year starting from the first day of November 20X0.
2. The inventory of unused repair supplies is $1,520
3. The estimated depreciation on repair equipment is $350.
4. Accrued one-month interest expense on Note Payable that will be paid on February 1 (Borrowing Note was in 6-month; annual interest rate is 6%).
5. Accrued salaries for 2 employees at the end of the month, payment for each person is $500
6. Service Revenue still unearned at the end of the period is $3,675
7. Service revenue earned but not billed is $1,800
C. Prepare an adjusted trial balance from above T-accounts

Answers

Answer:

Step-by-step explanation: A. Prepare journal entries to record the January transactions.

Paid the monthly rental fee, $790.

Debit Credit

Rent Expense 790

Cash 790

Made the monthly payment to Apple Company, $1,700 in order to decrease Accounts Payable.

Debit Credit

Accounts Payable 1,700

Cash 1,700

Purchased additional repair supplies on credit from Pineapple Company, $1,820.

Debit Credit

Supplies 1,820

Accounts Payable 1,820

Received cash for repair service performed, $2,950.

Debit Credit

Service Revenue 2,950

Cash 2,950

Paid cash for an advertisement in the local newspaper, $370.

Debit Credit

Advertising Expense 370

Cash 370

Paid Pineapple Company on account, $1,200.

Debit Credit

Accounts Payable 1,200

Cash 1,200

Collected payment for repair fees earned, $7,460.

Debit Credit

Accounts Receivable 7,460

Cash 7,460

Recorded a dividend paid to stockholders, $8,100.

Debit Credit

Dividends 8,100

Cash 8,100

B. Using the following information, record adjusting entries in the general journal and prepare the T- accounts for all accounts

One month of rent has expired. The rental policy is valid in one year starting from the first day of November 20X0.

Debit Credit

Prepaid Rent 90

Rent Expense 90

The inventory of unused repair supplies is $1,520

Debit Credit

Supplies 1,520

Supplies Expense 1,520

The estimated depreciation on repair equipment is $350.

Debit Credit

Depreciation Expense 350

Accumulated Depreciation - Equipment 350

Accrued one-month interest expense on Note Payable that will be paid on February 1 (Borrowing Note was in 6-month; annual interest rate is 6%).

Debit Credit

Interest Expense 100

Interest Payable 100

Accrued salaries for 2 employees at the end of the month, payment for each person is $500

Debit Credit

Salaries Expense 1,000

Salaries Payable 1,000

Service Revenue still unearned at the end of the period is $3,675

Debit Credit

Unearned Service Revenue 3,675

Service Revenue 3,675

Service revenue earned but not billed is $1,800

Debit Credit

Service Revenue 1,800

Accounts Receivable 1,800

C. Prepare an adjusted trial balance from above T-accounts

Debit Credit

Cash 35,080

Accounts Receivable 63,080

Prepaid Rent 1,510

Supplies 1,300

Equipment 13,900

Accumulated Depreciation - Equipment 3,500

Accounts Payable 2,380

Notes Payable 16,100

Interest Payable 100

Salaries Payable 1,000

Unearned Service Revenue 3,675

Service Revenue 6,475

Rent Expense 870

Read the following prompt and type your response in the space provided.
Sarah has a $30 music gift card. Each day she uses it to buy a $1.99 song download. For how many days will the gift card have still have a balance of more than $18?

Write an inequality to solve the problem and then solve showing your work. Explain what the solution to the inequality means.

Answers

Answer:

She will have a balance of more than $18 for up to 6 days

Step-by-step explanation:

Start with $30.

Each day, x, subtract $1.99 from $30.

30 - 1.99x

The amount must be greater than $18.

30 - 1.99x > 18

Subtract 30 from both sides.

-1.99x > -12

Divide both sides by -1.99. Remember than when you multiply or divide both sides of an inequality by a negative number, the inequality sign changes direction.

-1.99x/(-1.99) < -12/(-1.99)

x < 6.03

The number of days must be less than 6.03. Since we deal with whole days, she will have a balance of more than $18 for up to 6 days.

Find the sum.
17x³ + (3x + 8x³) =

Answers

The answer is 25x^3 + 3x

. DIG DEEPER What is Descartes's number?
• It is less than 300.
• It is greater than 200.
• The ones digit is 2 more than the hundreds digit.
• The tens digit is 2 more than the ones digit.

Answers

Descartes's number is the 46.989, which is less than 47 and higher than 46.98.

Define Descartes's number.

A Descartes number is an odd number with the formula n = m p, where m and p are coprime numbers and 2n = (m) (p + 1). P is regarded as a "spoof" prime in this formula. The only known example is the one that was provided. The invention of Cartesian or analytic geometry, which employs algebra to describe geometry, is one of Descartes's most enduring contributions. In equations, Descartes "introduced the convention of denoting unknowns by x, y, and z, and knowns by a, b, and c." A Descartes number is an odd integer that, if one of its composite elements were prime, would have been an odd perfect number.

Given,

Descartes's number is,

46.989, which is less than 47 and higher than 46.98.

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)) A football team has $630 to spend on hats for their fans. Each hat costs $5. How many
hats can the team buy?

Answers

Just divide $630 by $5 and you’ll get 126 which is the amount of hats you can buy
126 amount of hats vcvfvdvdcdcdffdf

Compute the scalar surface integral ∬T(z+y)dS where T is the triangle (including its interior) with vertices (0,0,2), (0,1,0)( and (1,0,0)

Answers

the scalar surface integral ∬T(z+y)dS where T is the triangle (including its interior) with vertices (0,0,2), (0,1,0)( and (1,0,0) is 1

We can compute the scalar surface integral ∬T(z+y)dS using the parametric form of the surface integral.

Let S be the surface of the triangle. We can parameterize S as follows:

S(u,v) = (u, v, 2-u-v)

where 0 ≤ u ≤ 1 and 0 ≤ v ≤ 1-u.

Then, the scalar surface integral ∬T(z+y)dS is defined as:

∬T(z+y)dS = ∬S(u,v) (2-u-v + v) dudv

= ∫0→1∫0→1-u (2-u-v + v) dudv

= ∫0→1 [2u + (1-u)2 - (1-u)2u - u2(1-u)] du

= ∫0→1 (2u + 1 - 2u2 - u3) du

= [u2 + u - u4/4]0→1

= 1/4 + 1 - ¼

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Find the derivative of f(x) = 3x² + 2x at 3. That is, find f '(3).

Answers

Answer:

20

Step-by-step explanation:

To find the derivative of f(x) = 3x² + 2x at x = 3, we can use the power rule:

f'(x) = 2*3x + 2

When x = 3, the derivative of f(x) is:

f'(3) = 2*3(3) + 2

f'(3) = 18 + 2

f'(3) = 20

Therefore, the derivative of f(x) = 3x² + 2x at x = 3 is f'(3) = 20.

You can spend at most $3.50 at a market. Apples cost $0.40 each, and pears cost $0.65 each. Let x be numbers of apples and y be numbers of pears. Write an inequality that represents the numbers of apples and pears you can buy. Is (3,4) a solution of the inequality?

Answers

Answer:

Step-by-step explanation:

.40x + .65 ≤3.50

(3, 4)  I think it is a solution to the inequality. Because when you graph it (3, 4) looks like it is shaded meaning that it is a solution. (If wrong, I'm sorry)

The inequality that represents the numbers of apples and pears you can buy is 0.40x + 0.65y ≤ 3.50.

What is a solution set to an inequality or an equation?

If the equation or inequality contains variable terms, then there might be some values of those variables for which that equation or inequality might be true. Such values are called solution to that equation or inequality. Set of such values is called solution set to the considered equation or inequality.

Given;

The cost of the apples = $0.40 per apple

So, the cost of x apples is 0.40x.

The cost of the pears = $0.65 per pear

So, the cost of y pears is 0.65y.

The total cost of the apples and pears is the sum of the cost of the apples and the cost of the pears, which is 0.40x + 0.65y;

Since we can spend at most $3.50 at the market, the total cost of the apples and pears must be less than or equal to $3.50;

Therefore, the inequality that represents the numbers of apples and pears you can buy will be 0.40x + 0.65y ≤ 3.50;

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What is the position of E on the number line below?
Write your answer as a fraction or a mixed number.
E

Answers

The position of E as a mixed number is [tex]2\frac{4}{5}[/tex].

What is number line?

A number line is a diagram of a graduated straight line used to represent real numbers in elementary mathematics. It is assumed that every point on a number line corresponds to a real number, and that every real number corresponds to a point.

Let on a number line the position of E is given.

We have to find E as a mixed number.

As we can see there are 5 parts between 2 and 3.

So each part is 0.2 cm.

The position of E is in fourth part.

So, 4 x 0.2 = 0.8 cm

2 + 0.8 = 2.8 is the position of E.

2.8 can be written as.

28/10 = 2 8/10 = 2 4/5

Hence, the position of E as a mixed number is [tex]2\frac{4}{5}[/tex].

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Farah wants to have a cool million dollars to retire with when she is 55. How much must she invest today at age 19 into an account that pays 8% compounded monthly to accomplish this goal?

Sam also wants a cool million dollars when he is 55 but is willing to put away money every year. How much must he put away each year after his 21st birthday with same interest rate as Farah but his investment is compounded annually?

Answers

To calculate how much Farah must invest today at age 19 to have a cool million dollars when she is 55, we need to know how many years she has until she retires. Since Farah wants to retire at age 55, she has 55-19 = <<55-19=36>>36 years until she retires.

We also need to know the interest rate that the account pays and the frequency at which the interest is compounded. In this case, the interest rate is 8% and the interest is compounded monthly.

To calculate how much Farah must invest, we can use the formula for the future value of an annuity, which is given by:

FV = PMT * (((1 + i)^n - 1) / i)

where FV is the future value that Farah wants to have, PMT is the amount that Farah must invest each period, i is the interest rate per period, and n is the total number of periods.

Since Farah wants to have a cool million dollars, we can set FV equal to $1,000,000. We also know that the interest rate is 8% and that the interest is compounded monthly, so we can set i equal to 8% / 12 = 0.006667. Finally, we know that Farah has 36 years until she retires, so we can set n equal to 36 * 12 = 432, since there are 12 months in a year.

Substituting these values into the formula above, we get:

FV = PMT * (((1 + i)^n - 1) / i)

FV = PMT * (((1 + 0.006667)^432 - 1) / 0.006667)

To solve for PMT, we can divide both sides of the equation by ((1 + 0.006667)^432 - 1) / 0.006667, which gives us:

PMT = FV / (((1 + i)^n - 1) / i)

PMT = $1,000,000 / (((1 + 0.006667)^432 - 1) / 0.006667)

Calculating this value gives us a result of PMT = $176.72, which is the amount that Farah must invest each month to have a cool million dollars when she is 55.

Now, let's consider Sam's situation. Sam also wants to have a cool million dollars when he is 55, but he is willing to put money into his account every year instead of every month. This means that the frequency at which the interest is compounded will be annual instead of monthly.

To calculate how much money Sam must put into his account each year, we can use the same formula as above but with a few changes. In particular, we need to set i equal to 8% / 1 = 0.08, since the interest is compounded annually, and we need to set n equal to 55-21 = <<55-21=34>>34, since Sam has 34 years until he retires.

Substituting these values into the formula above, we get:

FV = PMT * (((1 + i)^n - 1) / i)

FV = PMT * (((1 + 0.08)^34 - 1) / 0.08)

Solving for PMT gives us:

PMT = FV / (((1 + i)^n - 1) / i)

PMT = $1,000,000 / (((

What is 2 1/5 divided by 4/5 in mixed number form???​

Answers

2/5 is the best time to get your order
So in order for you to do this problem you have to start by turning the 2 1/5 into a mixed number. And you would do that by multiplying the 2 and the 5 which is 10 and adding a 1 which is 11 and put it over the denominator
2x5=10+1=11/5

And for the next part it’s going to form the problem
11/5 / 4/5

We would then want to change the sign since we cannot divide a fraction with another fraction this way so we would do KCF
Which stands for Keep, Change and Flip
We would Keep the first fraction which is 11/5 and change the divide sign to a multiplication sign and Flip our second fraction being 4/5. It would then look something like this:

11/5 x 5/4

Then multiply across and you would get 55/20 as your answer but it would be better to simplify it to being 11/4

Two researchers are gathering data on hours of video games played by school-aged children and young adults. They each randomly sample different groups of 150 students from the same school. They collect the following data.
Researcher A
Hours Played per Week Frequency Relative Frequency Cumulative Relative Frequency
0-2 26 0.17 0.17
2-4 30 0.20 0.37
4-6 49 0.33 0.70
6-8 25 0.17 0.87
8-10 12 0.08 0.95
10-12 8 0.05 1
Researcher B
Hours Played per Week Frequency Relative Frequency Cumulative Relative Frequency
0-2 48 0.32 0.32
2-4 51 0.34 0.66
4-6 24 0.16 0.82
6-8 12 0.08 0.90
8-10 11 0.07 0.97
10-12 4 0.03 1
Give a reason why the data may differ.
A) The researchers are studying different statistics, so there will be some variation in the data.
B) The researchers are studying different parameters, so there will be some variation in the data.
C) The researchers are studying the same statistic, so there will be some variation in the data.
D) The researchers are studying different samples, so there will be some variation in the data.
E) The researchers are studying the same population, so there will be some variation in the data.

Answers

The reason for data variation is that the researchers are studying different samples, so there will be some variation in the data.

What is meant by data?

In mathematics, data is a collection of facts and figures that can take any shape, whether it be numerical or not. You can calculate numerical data, which is always gathered in number form and includes things like student test results, employee salaries, football team member heights, etc.

Write types of data.

Qualitative, quantitative, discrete, continuous, primary and secondary are the types of data.

Since researches choose same school but group of 150 people is randomly chosen and different therefore, the reason for data variation is that the researchers are studying different samples, so there will be some variation in the data.

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PLEASE HELP WILL MARK BARINLIEST

Answers

Answer:

d= 120

Step-by-step explanation:

c+d = 180 degree

d = 180-60 =120 degree

d) an undeclared major thinks that the time it takes for a freshmen to pick their major has a standard deviation of 1 year. to find the average he surveys 10 freshmen and finds out how long it took them to pick a major. he does a confidence interval to find the average time it takes.

Answers

The time it takes a freshman to choose their major is thought to have a standard deviation of one year by an undeclared major. A t-distribution table can be used to determine the crucial value.

The confidence interval for the average time it takes for freshmen to pick a major can be found by taking the sample mean of the 10 freshmen surveyed and adding and subtracting

The margin of error is calculated by multiplying the sample standard deviation by the critical value from a t-distribution with degrees of freedom equal to (n-1), where n is the sample size.

The sample size in this instance is 10. A t-distribution table can be used to determine the crucial value.

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A satellite dish is shaped like a paraboloid of revolution. This means that it can be formed by rotating a parabola around its axis of symmetry. The receiver is to be located at the focus. If the dish is 24 feet across at its opening and 2 feet deep at its center, where should the receiver be placed?
Find the equation of the parabola?
How far above the vertex should the receiver be placed?

Answers

Equation of parabola: y =ax² and receiver should be placed 18 feet above vertex.

Explanation:

Considering satellite dish as parabola we can have vertex as origin and concave upward.

So, equation of parabola will be justifying structure of satellite dish i.e

y = ax² -------(1)

Two points other than (0,0) are (-12,2) and (12,2), unit being feet.

This points will satisfy equation of parabola, substituting them in equation 1, we will calculate the value of constant 'a'.

a = [tex]\frac{2}{12^{2} }[/tex]

[tex]\frac{2}{2*6*12}\\ =\frac{1}{72}[/tex]

Substituting value of a = 1/72 in equation 1 we get

72y = x²

As receiver need to be located at focus, so it will be places at a distance of 'p' above the vertex

4p = 72

Dividing both sides by 4, we get

p = 18 feet

So, receiver will be placed at a distance of 18 feet above vertex.

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Given the coordinates (0, 0) and (4, 1), the distance is

Answers

Answer:

distance = √17

Step-by-step explanation:

distance = √(y2 - y1)^2 + (x2 - x1)^2

distance = √(1 - 0)^2 + (4 - 0)^2

distance = √17

I hope my answer helps you.

In the case of Regression Analysis, the dependent variable must be ________; in multiple discriminant analysis, the dependent variable is______ in nature.
a. Metric; nonmetric
b. Metric; nominal
c. Nominal; categorical
d. Categorical; nonmetric
b. Metric; nominal

Answers

In the case of regression analysis, the dependent variable must be metric; in multiple discriminant analysis, the dependent variable is nominal in nature. (Option B)

Regression analysis refers to a collection of statistical methods which are used for the estimation of relationships between a dependent variable and one or more independent variables. It can used to assess the strength of the relationship between variables and for modeling their future relationship. In regression analysis the dependent variable is metrically scaled (where distance between values can be calculated). Multiple discriminant analysis is a regression technique used in statistics to group objects into categories for analysis. In multiple discriminant analysis the dependent variable is nominally scaled (where characteristics can be distinguished).

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Solve the system.
2x + y + 3z = 20
X + 2y - z = -11
3x - 2z = -3
Enter your answer as an ordered triple.

Answers

The solution to the system, as an ordered triple is: (3, -4, 6).

How to Solve a System of Equations?

To solve the following given system of equations:

2x + y + 3z = 20 --> eqn. 1

x + 2y - z = -11 --> eqn. 2

3x - 2z = -3 --> eqn. 3

Multiply equation 1 by 2 to get eqn. 4:

4x + 2y + 6z = 40 --> eqn. 4

Subtract eqn. 4 from eqn. 2:

x + 2y - z = -11 --> eqn. 2

4x + 2y + 6z = 40 --> eqn. 4

-3x - 7z = -51 --> eqn. 5

Add equations 3 and 5 together:

3x - 2z = -3 --> eqn. 3

-3x - 7z = -51 --> eqn. 5

-9z = -54

z = -54/-9

z = 6

Substitute the value of z into equation 5:

-3x - 7(6) = -51 --> eqn. 5

-3x - 42 = -51

-3x = -51 + 42

-3x = -9

-3x/-3 = -9/-3

x = 3

Find the value of y by substituting the values of x and z into equation 1:

2(3) + y + 3(6) = 20 --> eqn. 1

6 + y + 18 = 20

24 + y = 20

y = 20 - 24

y = -4

The solution as an ordered triple is: (3, -4, 6).

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Find the slope.
x
012345
y 3 6 9 12 15 18

Answers

The slope of the line is 3.

What is slope?

The slope or gradient of a line is a number that describes both the direction and the steepness of the line.

Given that, are points of a line,

The slope of a line passing through two points is = (y₂-y₁)/(x₂-x₁)

Considering the points (0, 3) and (1, 6)

Therefore, slope = (6-3)/(1-0) = 3

Hence, the slope of the line passing through the given points is 3.

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