Mathematics College

describe how a company that produce earphones can design a survey

Answers

Answer 1
First of all this survey need to be anonymous. The company need to know the population whom the survey is addressed. So, I think the following questions can be a good example:

1. Where do you usually use earphones? (Please select all that apply)

library 
home
transportation
kitchen
driving/riding
Other

2. What are the purposes you use earphones? (Please select all that apply)  learn language
listen to music
watch video
privacy concerns(show ‘don’t bother me’)
for beauty
Other

3. What kind of earphones you like the most?
 
circumaural
supra-aural
earbuds
in-ear 

4. What are the reasons make you like the earphone you chose in question 3? (Please select all that apply)
 
appearance
comfortability
function(plays music well) 
brand 
price 
portability 
Other

5. Have you ever felt vulnerable or unsafe while wearing headphones and listening to music because you are not as aware of your surroundings?
 
yes 
no

Related Questions

(4+8r^5) - (4r^5 + 2)

Answers

(4+8r^5) - (4r^5 + 2)

= 4+8r^5 - 4r^5 - 2
=  4r^5 +2
= 2(2r^5 + 1)

The simplest form of the equation is 2(2r^5 + 1)

Researchers produced a study that involved 875 workers in the auto industry. The study showed that after 30 years 367 were retired, 85 were still employed in the auto industry, 300 left the industry, and the rest were not reachable. What is the problem with this study?


precise numbers


missing data


self interest


voluntary response

Answers

Answer: B) missing data

There are 123 people that were not reachable, making missing data the biggest problem.
It could be voluntary, but we're not told that, and it is most likely not voluntary, which also cancels out the chance that it could be self-interest. Precise numbers are usually what you want to aim for when you collect data, so that isn't a problem here. 
According to this problem missing data would be the answer(B)

A video rental store charges $4 per day to rent a movie and $3 per day to rent a video game. During one summer, Tony paid a total of $140 to rent movies and video games from this store. If he rented twice as many video games as movies, how much did he spend on movie rentals during the summer?

Answers

Let's use the variables m and v for this:
4m + 3v = 140
v = 2m
Insert this variable:
4m + 3(2m) = 140
4m + 6m = 140
10m = 140
m = 14
One movie costs 4 dollars:
14*4 = 56
He spent $56 on movies

Find the shaded area of the basketball court to the nearest foot.

Answers

So the image consists of 1 rectangle and half a circle.

Rectangle - 12*19 = 228
Half a circle - [tex]\pi r^2 = \pi 6^2 = 36 \pi/2 = 18 \pi [/tex]

In the end there are 2 rectangles (2*228 = 456) and 1 full circle (18*2 = 36), which makes the shaded area 456 ft and 36[tex] \pi [/tex]
First, find the area of the rectangle, which is just 12•19=228 ft.

Then find the area of the semi-circle above it, which is pi times the radius squared. The diameter is 12ft, and we know the radius is half of the diameter, so the radius is 6ft. Our equation is pi times 6^2, or pi times 36.
We’ll just make pi 3.14, so 36•3.14=113.04 feet.

Add the area of the semi-circle and the rectangle together to get one of the shaded areas. 228+113.04= 341.04.

Now that we know the full area of one shaded region, we multiply it by two because there’s two of them. 341.04•2= 682.02.

Since we round it to the nearest foot, our final answer is that the shaded area of the basketball court is 682 square feet.

A rectangular deck is 12 ft by 14 ft. When the length and width are increased by the same amount, the area becomes 288 sq. ft. By how much were the dimensions increased?
2 ft
4 ft
8 ft
10 ft

Answers

To solve this problem you must apply the proccedure shown below:

 1. You have the following information given in the problem above:

 - The rectangular deck has the following dimensions: 12 ft by 14 ft.
 - When the length and width are increased by the same amount, the area becomes 288 ft².

 2. Therefore, you have:

 A=bxh

 288=(12x)(14x)
 288=168x²

 3. When you clear the x, you obtain:

 x=√288/168
 x=(2√21)/7≈1.31
 

Answer:

4 ft option (c)

Step-by-step explanation:

Length of a rectangular deck = 12 ft.

width of rectangular deck= 14 ft.

let the length and width are increased by the x ft.

New length = (12 + x) ft  

New width = (14+ x) ft.

area of rectangular width = length × width

according to the question

(12+x)(14+x) = 288

168+[tex]x^{2}[/tex]=+14x+12x = 288

[tex]x^{2}[/tex]+26x = 228-168

[tex]x^{2}[/tex]+26x-120=0

[tex]x^{2}[/tex]+ 30x-4x-120=0

x(x+30)-4x(x+30)

x=4 or x=-30

x=-30 is rejected

Hence, the length and width are increased by the 4 ft.

Approximately how many boxes that are 2 ft. by 2 ft. by 3.5 ft. fit inside of the back of a tractor trailer box truck whose dimensions are 28 ft. by 8 ft. by 9 ft.?

26 Boxes

87 Boxes

144 Boxes

216 Boxes

Answers

144 is the correct answer

Approximately how many boxes that are 2 ft. by 2 ft. by 3.5 ft. fit inside of the back of a tractor trailer box truck whose dimensions are 28 ft. by 8 ft. by 9 ft.?

Solution:

Volume of trailer box= Number of boxes * Volume of Box

Volume of Trailer Box=Length*Width*Height

Dimensions of Trailer Box are 28 ft. by 8 ft. by 9 ft.

Volume of Trailer Box=28*8*9ft³=2016ft³

Dimensions of box are 2 ft. by 2 ft. by 3.5 ft.

Volume of Box=2*2*3.5ft³=14ft³

Volume of Trailer Box=Number of Boxes *Volume of Box

2016=Number of Boxes*14

To get, Number of Boxes, Let us divide by 14

2016/14=Number of Boxes=144

Number of Boxes=144

Answer: Option C:144 boxes

What is the area of the trapezoid?


56 square inches

240 square inches

108 square inches

120 square inches

Answers

You'd add the bases then multiply by the height to get, 
120
Take care ^-^

Answer:

120

Step-by-step explanation:

solve for x x^2+3x<28

Answers

x² + 3x < 28
x² + 3x - 28 < 0
(x+7)(x-4) < 0

the zeros will be at x = -7  and x =4

∴ the solution of inequality
x ∈ (-7,4)

See the attached figure



the surface area of a polyhedron can be found by

Answers

It can be found by summing the areas of its faces

The surface area of a polyhedron is equal to the sum of the area of all of its faces. Said another way, the surface area is the total area covered by the net of a polyhedron.

Answer:

the surface area of a polyhedron can be found by sum of the area of all its sides.

Step-by-step explanation:

The surface area is nothing find the area of each faces and add them together.

Surface area = Sum of area of each faces.

Polyhedron is a three dimensional figure.

For instance, cube a polyhedron which has 6 square faces.

Surface area of a cube = [tex]a^{2} + a^2 + a^2 + a^2 + a^2 + a^2 = 6a^2[/tex], where "a" is the side of the square.

Therefore, the surface area of a polyhedron can be found by sum of the area of all its faces.

hey can you please help me posted picture of question

Answers

The parent reciprocal function is represented in the table.

As you can see, increasing the value of x, decreases the value of y as both are inversely related as:

[tex]y= \frac{1}{x} [/tex]

We can also write this equation as:

yx = 1

This means, the product of each x and y value must be 1 for parent reciprocal function. If you observe the table, the product of each pair is 1.

So the correct answer is option A
The pairs of values of x and y above represent that of the equation, 

   y = 1/x.

If we are to substitute the given values of x to determine the values of y for checking, the results are as shown below.

1.   y = 1/-2 = -0.5
2.   y = 1/-1 = -1
3.   y = 1/2 = 0.5
4.   y = 1/3 = 0.33

Thus, the answer to this item is the first option, y = 1/x. 

Rectangle QRST is shown.

What would be a reason to claim that QRST is NOT a square?

SECOND PICTURE ARE THE FOLLOWING SOLUTIONS.

WILL MARK BRAINLIEST!!!

Answers

That would be QT ≠ QR because then QT and QR is not same which makes it impossible for QRST to be square. Square needs all side lengths to be equal.

PLEASE PLEASE PLEASE HELP ME WITH ALGEBRA 1 PLEASE!?!?!?!?!!!?!?!?!?!?! I WILL GIVE LOTS OF POINTS AND BRAINLEST PLEEEEEEEEEEEEEEEEASE!!?!?!?!?!?!!?!?!?!?


What are the benefits and limitations to each method? When is it best to use each method?
1) graphing 2) substitution method 3) elimination method

Answers

With graphs on paper you can visually see intersecting lines(one solution), identical lines
(infinite solutions), or parallel lines(no solutions).
This method works best for lines that have integers for solutions. The task of determining rational or irrational solutions from graphs is difficult.

The substitution method usually must be used for equations with higher exponents. The deawback of this method is having to work with fractions.

The elimination method is often the method of choice.
This method however requires that you learn to recognize when the systems produce parallel lines or have equations that represent the same lines.

Answer:

don't copy exactly, this is my answer to the question.

Step-by-step explanation:

Any figure that has line symmetry must also have rotational symmetry. true or false

Answers

A figure that has line symmetry MUST also have a rotational symmetry.

 Answer is TRUE.

hey can you please help me posted picture of question

Answers

Answer:
The solutions are 4 and -4

Explanation:
To get the solutions, we will need to isolate x on one side of the equation.
This can be done as follows:
4x² - 30 = 34
4x² - 30 + 30 = 34 + 30
4x² = 64
x² = 64/4
x² = 16
x = ±√16
either x = +√16 = 4
or x = -√16 = -4

Hope this helps :)

[tex]4x^2-30=34\ \ \ |+30\\\\4x^2=64\ \ \ \ |:4\\\\x^2=16\to x=\pm\sqrt{16}\\\\x=\pm4\\\\\text{Answer:C. x=-4 and D. x=4}[/tex]

Find the volume of the given prism round to the nearest 10th if necessary

Answers

we know that
volume of the prism=area of the base*height
height=24 yd

area of the base
is a equilateral triangle
so
the internal angles are 60 degrees
with the law of sine calculate the area
Area=(1/2)*a*b*sin C-----> (1/2)*13*13*sin 60-----> (1/2)*13*13*√3/2
Area=73.18 yd²

volume of the prism=73.18*24-----> 1756.30 yd³

the answer is
1756.3 yd³

A house was valued at 398,000.over several the house increased by 0.08

Answers

Here's the equation to find the current price:
398000 + 0.08(398000)
We can make it simpler:
1.08(389000)
The current price is $420120

At a​ school, 129 students play at least one sport. This is 60​% of the students at the school. How many students are at the​ school?

Answers

(portion of school) = (1.00-portion) x (whole of group)
129 = (1.00-.60) x (whole school)
129 = .4 x (whole school)
129/.4 = Whole school
School size = about 323 students

Find the slope and y-intercept fotv

Answers

Look at the picture.

[tex]A(3;\ 2)\\\\the\ slope:\ m=\dfrac{2}{3}\\\\B(0; 0):\ y-intercept[/tex]

Remember: P(1+r)t Using the expression above, choose the correct answers for the new balance and the amount of interest earned in the following compound interest problem. $950 at 7% for 8 years, compounded annually. Total Amount = $ Interest Amount = $

Answers

Total amount
950×(1+0.07)^(8)
=1,632.28

Interest amount
1,632.28−950
=682.28

Andy is 2 years older than Jeff. In 5 years the sum of their ages will be 40.find their ages now? Explain your answer using algebra

Answers

Hello!

You can make two equations based on what you know

let x stand for andy's age
let y stand for Jeff's age

x = 2 + y
5 + x + 5 + y = 40

Put x into the second equation

5 + (2 + y) + 5 + y = 40

Combine like terms

12 + 2y = 40

Subtract 12 from both sides

2y = 28

Divide both sides by 2

y = 14

Put y into the first equation

x = 2 + (14)

x = 16

Andy is 16 and Jeff is 14

Hope this helps!


In a clinical trial for a new headache medication, participants are randomly assigned to a treatment group or a placebo group. They do not know whether they are receiving the medication or a placebo. The element of experiment design being used is _____.


randomization


blinding


replication

Answers

This is called randomization

Answer:

The element of experiment design being used is blinding.

Step-by-step explanation:

In a clinical trial for a new headache medication, participants are randomly assigned to a treatment group or a placebo group.  

The first step is to define the treatment group, it is performed in a random way, as most of the statically experiments.  

They do not know whether they are receiving the medication or a placebo.  

People inside both groups do not have information about the medication. It means they are blind to the possible effects.  

The blinding method is used mostly to remove the placebo effect in the sample. Because of that it is commonly used for clinical or any experimental assays as it was showed in this example.

Consider the following properties of the graph of an exponential function.
a. Horizontal Asymptote at x=-2
b. The graph is increasing from (-infinity, infinity)
c. The x-intercept is at (1,0)
What is the equation for this graph?

Answers

The parent exponential function is:

[tex]y= e^{x} [/tex]

The Horizontal asymptote of parent exponential function is y =0. For the function to have asymptote y=-2, it must be shifted 2 units down. So resulting graph will be:

[tex]y=e^{x} -2[/tex]

The function is increasing from left to right.

The above function does not have x-intercept at (1,0). For the function to have an x-intercept at (1,) it must be multiplied with some co-efficient as shown below:

[tex]y=a e^{x}-2 [/tex]

For x=1, y=0. So we can write:

[tex]0=a e^{1}-2 \\ \\ 2=ae \\ \\ a= \frac{2}{e} [/tex]

So, the exponential function satisfying the given conditions will be:

[tex]y= \frac{2}{e} e^{x}-2 \\ \\ y=2 e^{x-1} -2 [/tex]

Complete the steps to find the volume of the prism shown below.

Answers

Answer:

triangle

A = 6

V = 6 x 20 = 120

Step-by-step explanation:

Answer:

Shape of base - triangle

A = 6 units

V = 6 x 20 = 120

Hope it helps!

hey can you please help me posted picture of question

Answers

G(x) can be obtained from F(x) by shifting F(x) 4 units to the right and 1 unit upwards.

Shift towards right can be obtained by subtracting 4 from the x in the function and the upward shift can be obtained by adding 1 to the function.

So,

G(x) = F(x-4) + 1

Thus,

G(x) = (x-4)² + 1

So, the correct answer to this question is option B

The number of acres of wetland infested by an invasive plant species after t Years is given by u(t)=12•2^t/3. Solve the equation u(t)=50. What does your answer tell you about the wetland?

Answers

For this case we have the following equation:
 u (t) = 12 • 2 ^ t / 3
 We equate the equation for u (t) = 50.
 We have then:
 12 • 2 ^ t / 3 = 50
 We clear the value of t:
 2 ^ t / 3 = 50/12
 log2 (2 ^ t / 3) = log2 (50/12)
 t / 3 = log2 (50/12)
 t = 3 * log2 (50/12)
 t = 6.2 years
 Answer:
 After 6.2 years 50 acres of wetland are infested by an invasive plant species

Martha is making a scarf for her sister. Each day she knits 1/6 of a scarf....#1 what fraction of the scarf will be complete after 3 day...#2 What fraction will be complete after 6 days....#3 How can you use a number line to prove that your answers are correct?

Answers

You can use the number line to count up by 1/6s like day 1: 1/6 day 2:2/6 and so on. After three days 3/6s of the scarf will be done which is equivalent to 1/2 and on day 6: 6/6 of the scarf will be done which is equivalent to 1.
Hope I could help!
-Montana

PLEASE HELP ME WITH THIS MATH QUESTION

Answers

The general formula of an Arithmetic sequence is:

[tex] a_{n}= a_{1}+(n-1)*d [/tex]

Comparing this formula with the given formula, we can write:

Common Difference = d = 5

Since, every term of an Arithmetic sequence can be obtained by adding the common difference to the previous term, so we can write the recursive formula as: 

[tex] a_{n} = a_{n-1} +d[/tex]

For the given sequence we can write:

[tex] x_{n} = x_{n-1} +5[/tex]

So, the answer to this question is 5

what is the next number in this pattern 0.54,0.6,0.66,0.72

Answers

This is a linear pattern. In this case, every next number goes up by 0.06.
So, add 0.06 to 0.72.
0.06+0.72=0.78.
So, your answer is 0.78.
Have a nice day! ♪

the arc lenght of pi over 3 and 10m

Answers

[tex]\bf \textit{arc's length}\\\\ s=r\theta ~~ \begin{cases} r=radius\\ \theta =angle~in\\ \qquad radians\\ ------\\ r=10\\ \theta =\frac{\pi }{3} \end{cases}\implies s=10\cdot \cfrac{\pi }{3}\implies s=\cfrac{10\pi }{3}[/tex]

Jamal states that ax + b = a(x + c), given a, b, and c are not equal to 0.

What must be the value of c for Jamal’s statement to be true?

Answers

To answer the question, we must find c of the equation:
 ax + b = a (x + c)
 If we divide by "a" on both sides we have to:
 x + b / a = x + c
 For values of "a" other than zero.
 So:
 c = b / a.
 So that the affirmation of Jamal Be true c = b / a

Answer:

[tex]c=\frac{b}{a}[/tex]

Step-by-step explanation:

We have been given an equation [tex]ax+b=a(x+c)[/tex], given that a, b and c are not equal to 0.    

Let us solve for the value of c that will make Jamal's statement true.

Upon dividing both sides of our equation by a we will get,

[tex]\frac{ax+b}{a}=\frac{a(x+c)}{a}[/tex]

[tex]\frac{ax+b}{a}=x+c[/tex]

[tex]\frac{ax}{a}+\frac{b}{a}=x+c[/tex]

[tex]x+\frac{b}{a}=x+c[/tex]

Now, we will subtract x from both sides of our equation.

[tex]x-x+\frac{b}{a}=x-x+c[/tex]

[tex]\frac{b}{a}=c[/tex]

Therefore, the value of [tex]c=\frac{b}{a}[/tex] will make Jamal’s statement true.

Other Questions
write an equation that represents each mixed number as a sum of whole numbers and unit fractions 4 1/4 Which phase(s) would experience an increase in the rate of dissolution with an increase in temperature? A. gases only B. solids only C. liquids only D. both solids and liquids In a right triangle, if the measures of the other two angles are 2x 5 and 3x + 10, what are the measures of these two angles?A. 30 & 60B. 29 & 61C. 50 & 40D. 51 & 39 A random sample of 16 students selected from the student body of a large university had an average age of 25 years and a standard deviation of 2 years. we want to determine if the average age of all the students at the university is significantly more than 24. assume the distribution of the population of ages is normal. using = .05, it can be concluded that the population mean age is Thomas gained a lot of weight because he was eating too many sweets. a psychologist suggested to thomas that he pair the pleasant taste of sweets with the taste of something he finds unpleasant. so, thomas put broccoli, which he hates, in his ice cream, cake, and pie. he now feels nauseated at the sight of dessert and avoids eating it. this technique is known as? Hey can you please help me posted picture of question Which is the BEST description of the Supreme Court's decision in Bush v. Gore? A)The court ruled that the state of Florida's court-ordered manual recount of vote ballots in the 2000 presidential election was unconstitutional under the "Equal Protection Clause" of the 14th Amendment. B)The court ruled that the state of Florida's court-ordered manual recount of vote ballots in the 2000 presidential election was constitutional under the Voting Rights Act of 1965. C)The court interfered with the election results and effectively gave the presidency to Al Gore even though he received less of the popular vote than George Bush. D)The court found that the manual recount of Florida's popular vote was NOT in violation of the 14th Amendment's "Equal Protection Clause." We wish to dilute some 18.4 m h2so4 solution to make 600 ml of a 0.1 m h2so4 solution. how much of the 18.4 m solution should we start with? Simplify the expression below. 6n2 - 5n2 + 7n2 what battle established the united states control over the western frontier? Discuss which of the four phases in the food chain you think is the most important part of the chain. Explain why you believe this is true using at least 2 complete, detailed sentences. Research on galapagos finches by peter and rosemary grant showed that a type of natural selection called Youre baking a circular cake for a party. Your cake can be any size you want. What will the radius of your cake be and how many slices will you be able to cut? Olivia has experienced multiple symptoms, including fatigue and depression, for which her doctor has not been of much help. she decides to attend a healing retreat during which a practitioner holds her hands just above olivia's body. this treatment is an example of How long does it take for the moon to complete one cycle? In a study of 38% of adults questioned reported that their health was excellent. a researcher wishes to study the health of people living close to a nuclear power plant. find the probability that when 11 adults are randomly selected, at most 3 are in excellent health Oscar likes to run at night. even though it is dark, oscar can see because his eyes have specialized cells that convert the low levels of light energy into neural activity. these cells are known as This is an example of episodic memory or (personally experienced events).a. your age on your last birthdayb. the event leading up to your high school graduationc. freud is considered the father of psychology.d. the sports scores from this week's newspaper Seed corn was $5 per bag, whereas dog food cost only $3 per bag. Wewoka bought 50 bags and spent $190. How many bags of dog food did she buy? Peter makes $7,000 a month plus some extra commission he makes 6% of everything he sells if Peter sold $55,000 of jewelry this month what his salary this month