In a survey of 400 households regarding ownership of HDTVs and DVD players, the following data were obtained. 315 households own one or more HDTVs. 150 households own one or more HDTVs and one or more DVD players. 16 households do not own an HDTV or a DVD player. How many households only own one or more DVD players?

Answers

Answer 1

Number of households only own one or more DVD players = 219

Total number of households considered for the survey = 400

Let n(A) represent the number of households only own one or more HDTVs.

Then n(A) = 315

Let n(B) denotes the number of households only own one or more DVD players. We need to find n(B).

Number of households own one or more HDTVs and one or more DVD players, n(A∩B) = 150

Number of households do not own an HDTV or a DVD player = 16

So the number of households which own an HDTV or a DVD player, n(A∪B) = 400 - 16 = 384

Then we have the formula relating n(A∪B), n(A), n(B) and n(A∩B).

n(A∪B) = n(A) + n(B) - n(A∩B)

n(B) = n(A∪B) - n(A) + n(A∩B)

           = 384 - 315 + 150

           = 219

The number of households only own one or more DVD players = 219

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Related Questions

Macmillan Learning
The summer monsoon rains bring 80% of India's rainfall and are essential for the country's agriculture. Records going back
more than a century show that the amount of monsoon rainfall varies from year to year according to a distribution that is
approximately Normal with mean 852 millimeters (mm) and standard deviation 82 mm. Use the 68-95-99.7 rule to answer the
questions.
Between what values do the monsoon rains fall in the middle 95% of all years? Enter your answer as an interval "(lower bound.
upper bound)" and as a whole number.
The middle 95% of the distribution of moonsoon rainfall amount:
How small are the monsoon rains in the driest 2.5% of all years? Give your answer as a whole number.
The driest 2.5% of monsoon rainfall amount are less than:
MD
688
Sep 8
mm
mm
10:30

Answers

Using the Empirical Rule, it is found that:

The middle 95% of the distribution of moonsoon rainfall amount: (688 mm, 1016 mm).The driest 2.5% of monsoon rainfall amount are less than: 688 mm.

What does the Empirical Rule state?

It states that, for a normally distributed random variable:

Approximately 68% of the measures are within 1 standard deviation of the mean.Approximately 95% of the measures are within 2 standard deviations of  the mean.Approximately 99.7% of the measures are within 3 standard deviations of the mean.

Hence, the middle 95% of values is within 2 standard deviations of the mean, with bounds given as follows:

852 - 2 x 82 = 688 mm.852 + 2 x 82 = 1016 mm.

The middle 95% of the distribution of moonsoon rainfall amount: (688 mm, 1016 mm).

For the driest 2.5% of years, considering the symmetry of the normal distribution, we have to look at 2 standard deviations below the mean, as 5/2 = 2.5%, hence:

The driest 2.5% of monsoon rainfall amount are less than: 688 mm.

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What is 3.81704*10^5?

Answers

Answer: 381704, because math

Stefan drove to work in rush hour traffic, going just 25 miles in 1 hour and 8 minutes. Later that day, he left work early to avoid the rush and was able to take the same route home in 32 minutes. What was Stefan's average speed overall?

Answers

The average speed of stefan is 0.57 miles per hour.

Given, In heavy traffic, Stefan covered just 25 miles in 1 hour and 8 minutes on his way to work.

He left work early to beat the rush hour and made it home in 32 minutes using the same route.

speed of steven in heavy traffic = distance/ time

distance = 25 miles

time = 1 hour and 8 minutes = 68 minutes

therefore, speed = 25/68 = 0.36 miles per hour.

speed of steven while returning back to home.

distance = 25 miles

time = 32 minutes.

speed = 25/32 = 0.78 miles per hour.

average speed = 0.36 ₊ 0.78/2

= 1.14/2

= 0.57 miles per hour.

hence we get the average speed as 0.57 miles.

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help solve please x^3-2x^2-2=0

Answers

Answer:

x=2.35930...

i hope this is the answer

f(x)=√x
Find the derivative using the definition of derivatives

Answers

The derivative of the given expression is as follows   = [tex]\frac{1}{2 \sqrt{x_0}}[/tex]

definition of derivatives:

The derivative is the rate of change in a function without respect to a variable in mathematics. Derivatives are essential for solving calculus as well as differential equations problems.

What is a derivative and what are the many types?

Options, forwards, futures, and swaps are the four primary types of derivative contracts. Options represent derivative contracts that provide the buyer the right to buy or sell the underlying asset at a predetermined price during a specific time period. The purchaser is not required to execute the option.

According to the given data:

Let f:(0,∞)→R;

f(x)=√x, and x₀∈(0,∞) be an accumulation point of (0,∞).

We must find f′ such that for all x₀, f′(x₀) defined as:

limx→x₀(f(x)−f(x₀))/(x−x₀) exists.

Now,

x−x₀=(√x−√(x₀))(√x +√(x₀)).

Then:

[tex]\lim _{x \rightarrow x_0} \frac{f(x)-f\left(x_0\right)}{x-x_0}[/tex] = [tex]\lim _{x \rightarrow x_0} \frac{\sqrt{x}-\sqrt{x_0}}{\left(\sqrt{x}-\sqrt{x_0}\right)\left(\sqrt{x}+\sqrt{x_0}\right)}[/tex]

                            = [tex]\lim _{x \rightarrow x_0} \frac{1}{\sqrt{x}+\sqrt{x_0}}[/tex]

                            = [tex]\frac{1}{2 \sqrt{x_0}}[/tex]

The derivative of the given expression is as follows   = [tex]\frac{1}{2 \sqrt{x_0}}[/tex]

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The question you are looking for is:

Use the definition to find the derivative of f(x)=(√x), for x>0. Is f differentiable at zero? Explain.

i need help with these 2 questions {^_^]

Answers

The answer is:
7) - 14
9) 16 1/2

Which of the following represents the sum of the polynomials below?
(6x³ +2ײ +9x)+(-2x³ +5x² +3x)
OA. 4x³ +7x² +12x
OB. 4x³ +7x² +12
OC. 8x³ +7x² +12x
OD. 4x³ +7x² +6x

Answers

Answer:

A

Step-by-step explanation:

First, you have to align the like terms next to each other so that it will be easier to combine like terms. (Like terms have the same variables and powers)

[tex]6x^3+(-2x^3)+2x^2+5x^2+9x+3x[/tex]

Combine like terms:

(When combining like terms all you have to do is add/subtract the coefficients, number in front of variables, and leave the variable and exponents)

[tex]6x^3+(-2x^3)= > 6x^3-2x^3=4x^3[/tex]

[tex]2x^2+5x^2=7x^2[/tex]

[tex]9x+3x=12x[/tex]

So, we get [tex]4x^3+7x^2+12x[/tex]

Which of the following equations represents a line that passes through the points (5,3) and (-5,-1). Both, neither, 1, or 2.
1. y+1=2/5(x+5)
2. y=-2/5x+1
PLS ANSWER

Answers

Answer:

Both

Step-by-step explanation:

(5, 3) and (-5, -1)

To get the equation of two points(coordinate)

(y₂ - y₁)/(x₂ - x₁) = (y - y₁)/(x - x₁)

(5, 3) --- (x₁, y₁)

(-5, - 1) --- (x₂, y₂)

(- 1 - 3)/(- 5 - 5) = (y - 3)/(x - 5)

-4/-10 = (y - 3)/(x - 5)

4/10 = (y - 3)/(x - 5)

⅖ = (y - 3)/(x - 5)

5(y - 3) = 2(x - 5)

5y - 15 = 2x - 10

5y = 2x - 10 + 15

5y = 2x + 5

Divide through by 5

5y/5 = 2x/5 + 5/5

y = ⅖x + 1

Option 2 is correct

let's see if option 1 is correct

y = ⅖x + 1

add 1 to both sides.

y + 1 = ⅖x + 1 + 1

y + 1 = ⅖x + 2

y + 1 = ⅖(x + 5)

So, option 1 is also correct

Answer:

Both

Step-by-step explanation:

(5, 3) and (-5, -1)

To get the equation of two points(coordinate)

(y₂ - y₁)/(x₂ - x₁) = (y - y₁)/(x - x₁)

(5, 3) --- (x₁, y₁)

(-5, - 1) --- (x₂, y₂)

(- 1 - 3)/(- 5 - 5) = (y - 3)/(x - 5)

-4/-10 = (y - 3)/(x - 5)

4/10 = (y - 3)/(x - 5)

⅖ = (y - 3)/(x - 5)

5(y - 3) = 2(x - 5)

5y - 15 = 2x - 10

5y = 2x - 10 + 15

5y = 2x + 5

Divide through by 5

5y/5 = 2x/5 + 5/5

y = ⅖x + 1

Option 2 is correct

let's see if option 1 is correct

y = ⅖x + 1

add 1 to both sides.

y + 1 = ⅖x + 1 + 1

y + 1 = ⅖x + 2

y + 1 = ⅖(x + 5)

So, option 1 is also correct

Ann is 4 years older than Julie. 4 years ago Ann was twice as old as Julie. Find their present ages.

Answers

Answer: Julie is 8 years old. Ann is 12 years old.

Step-by-step explanation:

A=Ann's age. J=Julie's age

A=J+4

A-4=(J-4)*2

A-4=2(J-4)

A=2(J-4)+4

2(J-4)+4=J+4

2J-8+4=J+4

2J-4=J+4

2J=J+8

J=8

A=J+4

A=8+4

A=12

Julie is 8 years old. Ann is 12 years old.

Julie's present age (x) is 8 years old, and Ann's present age (x + 4) is 12 years old. Julie is 8 years old and Ann is 12 years old.

Let's denote Julie's age as x.

Since Ann is 4 years older than Julie, her age can be represented as x + 4.

Four years ago, Julie's age was x - 4 and Ann's age was (x + 4) - 4 = x.

Since Ann was twice as old as Julie, we can write the equation

: x = 2(x - 4).

Simplifying the equation, we get: x = 2x - 8.

Rearranging the terms, we find: x - 2x = -8.

Combining like terms, we have: -x = -8.

Finally, solving for x, we get: x = 8.

Therefore, Julie's present age (x) is 8 years old, and Ann's present age (x + 4) is 12 years old.

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Two negative consecutive integers have a sum of -45. What are the two integers?​

Answers

Answer:

-23+-22=-45

Step-by-step explanation:

In this type of question if he wants the consequtive divided number over 2 and choose the result number and pervious or next one it is depend on the questions

Answer:

The two integers will be/ are - 23 and - 24

estimate the cube root of 1100​

Answers

Answer:

Step-by-step explanation:

∛1100

Answer:

10.324

Step-by-step explanation:

I doesn't have a perfect cube root

A research group surveyed 250 students. The students were asked how often they go to the movies and whether they prefer comedies or dramas

Answers

The percentage of the students who go to the movies three times a month or more is equal to 34%.The percentage of the students who prefer dramas is equal to 56%.

What is a percentage?

A percentage can be defined as any number that is expressed as a fraction of hundred (100). This ultimately implies that, a percentage indicates the hundredth parts of any given number.

The percentage of the students who go to the movies three times a month or more is given by:

Total students = 30 + 55 = 85 students.

Percentage = 85/250 × 100

Percentage = 0.34 × 100

Percentage = 34%.

The percentage of the students who prefer dramas is given by:

Total students = 85 + 55 = 140 students.

Percentage = 140/250 × 100

Percentage = 0.56 × 100

Percentage = 56%.

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Complete Question:

A movie club surveyed 250 high school students. The students were asked how often they go to the movies and whether they prefer comedies or dramas. Their responses are summarized in the following table.

(a) What percentage of the students go to the movies three times a month or more?

(b) What percentage of the students prefer dramas?

Write equations for the horizontal and vertical lines passing through the point (1,6) .

Answers

Answer:

the horizontal and vertical lines passing through the point (1,6)

y-6=

x-1=

Step-by-step explanation:

Answer:

x=1 and =

Step-by-step explanation:

h(x)=x squared +1 k(x)=x-2 (h+k)(2)

Answers

The value of the function  (h+k)(2) is 1

What is a function?

A function can be defined as an expression or rule that shows relationship between an independent and dependent variable.

Given the functions;

h(x)= x ² +1 k(x)=x-2

To determine ( h + k), we have

( h + k) = x² + 1 + x - 2

Then,

(h+k)(2), substitute the value of x as 2

(h+k)(2) = (2)² + 1 - (2) - 2

(h+k)(2) = 4 + 1 - 4

(h+k)(2) = 1

Thus, the value of the function (h+k)(2) is 1

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Compare and order the following numbers:

√11, 2 1/4, -2.5, 3.6 repeating, -3.97621...

Answers

The correct decreasing order of the given numbers is : 3.32 > 2.25 > -2.25 > -3.98

What is Descending Order ?

Descending order is a way to arrange numbers from largest to smallest. When we arrange things in order, from a higher value to a lower value, it is known as the descending order or the decreasing order.

√11 = 3.316 = 3.32 (rounding off to two decimal places)

2 1/4 = 9/4 = 2.25 (by solving mix fraction)

-2.25 (negative number is written in negative x- axis)

-3.97621 = -3.98 (negative number is written in negative x- axis)

arranging the numbers in descending order

3.32 > 2.25 > -2.25 > -3.98

therefore, the highest number is 3.32 and the lowest number is -3.98

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first steps in factoring a polynominal with four terms

Answers

Answer:

Subtract two sides

Step-by-step explanation:

15(2x + 3) = 85 + 10x

Answers

Answer:

x = 2

Step-by-step explanation:

Hello!

Solve for x by isolating the variable.

Solve for x15(2x + 3) = 85 + 10x30x + 45 = 85 + 10x  20x + 45 = 8520x = 40x = 2

The value of x is 2.

What is 8 x 1 plus 5 x 1/1000 plus 9 x 1/1000

Answers

The value of the expression 8 × 1 plus 5 × 1/1000 plus 9 × 1/1000 is 8.014.

Consider the expression,

8 × 1 plus 5 × 1/1000 plus 9 × 1/1000

Now,

8 × 1 = 8 and;

5 × 1/1000 = 5/1000

and;

9 × 1/1000 = 9/1000

Now,

8 × 1 + 5 × 1/1000 + 9 × 1/1000 = 8 + 5/1000 + 9/1000

8 × 1 + 5 × 1/1000 + 9 × 1/1000 = 8 + [ ( 9 + 5 ) / 1000 ]

8 × 1 + 5 × 1/1000 + 9 × 1/1000 = 8 + 14 / 1000

8 × 1 + 5 × 1/1000 + 9 × 1/1000 = ( 8 / 1 ) + ( 14 / 1000 )

Now, LCM of 1 and 1000 is 1000.

8 × 1 + 5 × 1/1000 + 9 × 1/1000 = 8 × ( 1000/1000) + 14/1000

8 × 1 + 5 × 1/1000 + 9 × 1/1000 = 8000/1000 + 14/1000

8 × 1 + 5 × 1/1000 + 9 × 1/1000 = ( 8000 + 14 ) / 1000

8 × 1 + 5 × 1/1000 + 9 × 1/1000 = 8014/1000

8 × 1 + 5 × 1/1000 + 9 × 1/1000 = 8.014

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Factor completely
2x^5-7x^5/2+6

Answers

after simplifying yhe expression 2 x ⁵ - 7 x ⁵ / 2 + 6, we get the result as - 3 / 2 ( x⁵ - 4).

We are given the expression :

2 x ⁵ - 7 x ⁵ / 2 + 6

We need to factorize the expression completely.

Taking LCM, we get that,

4 x⁵ - 7 x⁵ + 12 / 2

combining the like terms, we get that,

- 3 x ⁵ + 12 / 2

taking - 3 common from the expression, we get that

- 3 / 2 ( x⁵ - 4)

Therefore, after simplifying yhe expression 2 x ⁵ - 7 x ⁵ / 2 + 6, we get the result as - 3 / 2 ( x⁵ - 4).

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identify the set or sets of numbers that belong to -8/5

Answers

The number of the sets  is the  {1, 2/5,4/5,8/5}.

According to the statement

We have to find that the sets of numbers.

So, For this purpose, we know that the

A set of numbers is a collection of numbers, called elements. The set can be either a finite collection or an infinite collection of numbers.

From the given information:

The set or sets of numbers that belong to -8/5.

For make a set of the numbers we have to find the those number which are the divisible on the number -8/5.

Then

Let the number 1, 2/5,4/5,8/5.

And these are the numbers which are the divisible on the -8/5 and give some perfect value like 1, 2 etc.

The set of the numbers = {1, 2/5,4/5,8/5}

So, The number of the sets  is the  {1, 2/5,4/5,8/5}.

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chemical property is__________. a. a property that does not change the chemical composition of the matter. b. a characteristic of matter that indicates whether or not the piece of matter can undergo specific changes c. a property that changes with the physical location of the matter sample, d. a characteristic of matter that can be measured without changing the identity of the material

Answers

Answer:

Physical Property

Step-by-step explanation:

Physical Property. A physical property is a characteristic of a substance that can be observed or measured without changing the identity of the substance. Silver is a shiny metal that conducts electricity very well.

The reciprocal of x is 0.25. The reciprocal of y is 10.

Work out the value of xy.

The book says the answer is 5/6 but I can’t get the same answer. Please help.

Answers

Answer:

XY=2/5

Step-by-step explanation:

Given the reciprocal of x is 0.25, that is then

x = 1/ 1/4 = 4

Given the reciprocal of y is 10 then

y = 1/10

xy = 4 ×1/10 =4/10 = 2/5

-4 66/100 greater or less than -4 3/4

Answers

After the conclusion we can conclude that the fraction  [tex]-4\frac{66}{100} < -4\frac{3}{4}[/tex].

What are fractions?A fraction is a portion of a whole or, more broadly, any number of equal parts. In everyday English, a fraction describes the number of parts of a specific size, such as one-half, eight-fifths, or three-quarters.

First, we need to make both denominators the same in order to find which fraction is greater and less than.

So,

[tex]-4\frac{66}{100} , -4\frac{3}{4} \\[/tex](-400+66)/100, (-16+3)/4-334/100, -13/4(-334×4)/(100×4), (-13×100)/(4×100)-1336/400, -1300/400

Hence, -1336/400 < -1300/400

So, we can conclude that:  [tex]-4\frac{66}{100} < -4\frac{3}{4}[/tex]

Therefore, the fraction  [tex]-4\frac{66}{100} < -4\frac{3}{4}[/tex].

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35 POINTS Rebecca has 3 paintings to sell. The amount of money Rebecca makes from selling x paintings is represented by a function.

f(x)=25x

What is the domain of the function?




all real numbers

{25, 50, 75}


{0, 25, 50, 75}


{0, 1, 2, 3}

Answers

Answer:

First one because she will not buy it for free so 0 isn't in the domain

Answer:

all real numbers I believe

..・ヾ(。><)シ

Somone help me on this free 20 poins

Answers

Answer:

T = 3.67 years

Step-by-step explanation:

3.67 years is the answer

12/7 divided by 3/2 =

A. 18/7
B. 7/8
C. 7/18
D. 8/7

Answers

Answer:

Step-by-step explanation:

D

To divide a fraction by another fraction you multiply by the multiplicative inverse
12/7 divided by 3/2 becomes 12/7 times 2/3

Multiplied out you get 24/21 which reduces by dividing both the denominator and numerator by 3 giving you 8/7 or letter D

Find the 9th term of the arithmetic sequence with 9=10 and d= - ½

Answers

The 9th term of this arithmetic sequence is 6.

In an Arithmetic Progression (AP), the nth term is given by the formula-

a9 = a + (n-1)d

where a = first term of the AP

d = common difference

Here, we are given that a= 10 and d = - ½

Let the 9th term of the AP be a9

Therefore, according to the formula for finding the nth term of an AP, we get-

a9 = a + (9-1)d

a9 = a + 8d

Substituting the values of a and d given in the question-

a9 = 10 + 8(-1/2)

a9 = 10 - 4

a9 = 6

Thus, the 9th term of the arithmetic sequence is 6.

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The sum of the angle measures of a quadrilateral is 360°. In Exercises 7 and 8,
write and solve an equation to find the value of x. Use a protractor to check the
of your answer.
reasonableness
7.
110°
90⁰
to
80⁰

Answers

The value of the  angle of the quadrilateral is 80° .

A quadrilateral in geometry is represented as a four-sided polygon with four  corners (vertices) and four sides .

The Latin words quadri, a variation of four, and latus, meaning "side," are the source of the name. In reference to other polygons, it is also known as a tetragon, from the Greek "tetra" for "four" and "gon" for "corner" or "angle" (e.g. pentagon). Since "gon" is an anagram for "angle," it is also known as a quadrangle or 4-angle.There are two types of quadrilaterals: simple (not self-intersecting) and complex (self-intersecting, or crossed). Convex or concave quadrilaterals are simple quadrilaterals.The sum of all the angle measures of a quadrilateral is 360°

Given angles of the quadrilateral are 110° ,90⁰ and 80⁰.

Now let us consider the fourth angle be x.

∴110°+ 90⁰ + 80⁰ + x = 360°

or, x = 360° - (280°)

or, x = 80°.

The missing angle of the quadrilateral is 80°

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18. C(−8, −6) and D(−4, 10)

Answers

Answer:

I'm assuming you want to find the slope.

If so, the answer is: m = 4

Hope this helps! <3

Given f(x) = -x - 9 and g(x) = 3x + 8, find (f + g)(−8).

Answers

Answer: -17

Step-by-step explanation:

f(x) = -x - 9 and g(x) = 3x + 8

(f + g)(−8)=

f(-8)+g(-8)=

-(-8)-9+3(-8)+8=

8-9-24+8=

-1-16=-17

Other Questions
A _____ person must be designed by the employer and have knowledge related to soil classification , protective sywtems If a process exits and there are still threads of that process running, will they continue to run? Select the correct answer from each drop-down menu.India proved to be of great economic V importance to the British in the ninezeenth century. India was rich in natural resources. Forexamole it was. major supplier ofv to the British. India also had massive population of abou: 300 million people. TheIndian masses were a potentialV of finished British goods.ResetNext If the local government can enforce a rent-control law that sets the maximum monthly rent at $2,000, will there be a surplus or a shortage? george affects a dangerous persona so that people will do what he wants. this is the impression strategy of: Explain how people can become obese even if their intake of dietary fat is relatively low compared with carbohydrate intake. As babies, we learned by trial and error. through traditional education, we think more like ______. group of answer choices a. franchisees b. managers c. entrepreneursd. collaborators All else held constant, higher inflation in the united states relative to that in canada will cause a(n) _____. in the context of grit, excellence is the commitment to long-term goals through purposeful deliberate practice. what is the strongest type of intermolecular force between solute and solvent in each of the following solutions? to determine this: 1) identify the strongest type of intermolecular force in the pure solute; 2) identify the strongest type of intermolecular force in the pure solvent. Triangle ABC is transformed to triangle ABC, as shown below: A coordinate grid is shown from negative 4 to 0 to 4 on both x- and y-axes. A triangle ABC has A at ordered pair negative 3, 4, B at ordered pair negative 4, 2, C at ordered pair negative 1, 1. A triangle A prime B prime C prime has A prime at ordered pair 3, 4, B prime at ordered pair 4, 2, C prime at ordered pair 1, 1. Which equation shows the correct relationship between the measures of the angles of the two triangles? (1 point) a The measure of angle ABC = The measure of angle A prime B prime C prime b The measure of angle ABC = The measure of angle B prime C prime A c The measure of angle BCA = The measure of angle A prime B prime C prime d The measure of angle BCA = The measure of angle C prime A prime B prime The ratio of red marbles to blue marbles in a jar is 5:2. The total number of marbles is 21. What is thesmaller amount of marbles in the jar? a marketing firm does a survey to find out how many people use a product. to accomplish this, they select a random sample of one hundred people consumers and record how many use the product. The Romans, especially Pontius Pilate, believed Jesus was the true Messiah and was to be honored. True False What do you think st. thomas aquinas means when he said " arts is opposite to the practical Which one is bigger 80m or 8km Which expression demonstrates how the Distributive Property could be used to find the product of 5 and 48?A. 5 (50) 2B. None of theseC. 50 5 (2)D. 5 (50) + 5 (2)E. 5 (50 2) + 5 (2)HELP ME PLEASEEEE!!!!! the demand curve for a normal good will always slope downward because: a even though the substitution effect and the income effect move in opposite directions, the income effect dominates, and it always displays an inverse relation between price and quantity demanded. b even though the substitution effect and the income effect move in opposite directions, the substitution effect dominates, and it always displays an inverse relation between price and quantity demanded. c even though the substitution effect and the income effect move in opposite directions, the two effects cancel each other out. d the substitution effect and the income effect reinforce each other, and the income effect always displays an inverse relation between price and quantity demanded. e the substitution effect and the income effect reinforce each other, and the substitution effect always displays an inverse relation between price and quantity demanded. How much must you have saved if the account earns 16 nnually if you plan to withdraw $5000 per year for the next 10 years when there is nothing left? a theorist proposes that children learn language by observing and imitating their parents, who in turn reinforce the sounds and words their children produce. in the nature versus nurture debate, where does this theorists proposal fit?