Amelia is conducting a survey in their neighborhood about noise pollution.
Choose three things they should do to get a representative sample and check that it is representative.
Answers
Amelia should randomly choose people only in their block.
Amelia should ask people what part of the neighborhood they live in.
Amelia should ask people their age.
What is representative sample?A representative sample are data collected from small group of individual which can be use to represent a large population of people so as to reach a conclusion.
Most researcher tend to make use of representative sample when they want to draw a conclusion as it save time and reduce the stress of having to carryout survey on a larger population.
Therefore Amelia should randomly choose people only in their block.
Learn more about representative sample here:https://brainly.com/question/25142707
Answer:
heres what i got!
Related Questions
Find the derivative.
[tex]\dfrac{d}{dx} \left[ \sin^{-1}(\cos e^x)-\cos^{-1}(\sin e^x) \right][/tex]
Answers
[tex]\qquad\qquad\huge\underline{{\sf Answer}}[/tex]
[tex]\qquad \tt \dashrightarrow \:\dfrac{d}{dx} \left[ \sin^{-1}(\cos e^x)-\cos^{-1}(\sin e^x) \right][/tex]
[tex]\qquad \tt \dashrightarrow \:\dfrac{d}{dx} \sin^{-1}(\cos e^x) - \dfrac{d}{dx}\cos^{-1}(\sin e^x) [/tex]
[tex]\qquad \tt \dashrightarrow \: \bigg(\dfrac{1}{ \sqrt{1 - ( \cos( {e}^{x} ) ) {}^{2} } } \times - \sin( {e}^{x} ) \times {e}^{x} \bigg) - \bigg( - \dfrac{1}{ \sqrt{1 - ( \sin( {e}^{x} )) {}^{2} } } \times \cos( {e}^{x} ) \times {e}^{x} \bigg)[/tex]
[tex]\qquad \tt \dashrightarrow \: \bigg(\dfrac{ - {e}^{x} \sin( {e}^{x} ) }{ \sqrt{1 - ( \cos( {e}^{x} ) ) {}^{2} } } \bigg) - \bigg( - \dfrac{ {e}^{x} \cos( {e}^{x} ) }{ \sqrt{1 - ( \sin( {e}^{x} )) {}^{2} } } \bigg)[/tex]
[tex]\qquad \tt \dashrightarrow \: \dfrac{ - {e}^{x} \sin( {e}^{x} ) }{ \sqrt{1 - \cos {}^{2} ( {e}^{x} ) {}^{} } } + \dfrac{ {e}^{x} \cos( {e}^{x} ) }{ \sqrt{1 - \sin {}^{2} ( {e}^{x} ) {}^{} } } [/tex]
[tex]\qquad \tt \dashrightarrow \: \dfrac{ - {e}^{x} \sin( {e}^{x} ) }{ \sqrt{ { \sin}^{2} ( {e}^{x} ) {}^{} } } + \dfrac{ {e}^{x} \cos( {e}^{x} ) }{ \sqrt{ \cos {}^{2} ( {e}^{x} ) {}^{} } } [/tex]
[tex]\qquad \tt \dashrightarrow \: \dfrac{ - {e}^{x} \sin( {e}^{x} ) }{ { { \sin}^{} ( {e}^{x} ) {}^{} } } + \dfrac{ {e}^{x} \cos( {e}^{x} ) }{ { \cos {}^{} ( {e}^{x} ) {}^{} } } [/tex]
[tex]\qquad \tt \dashrightarrow \: - {e}^{x} + {e}^{x} [/tex]
[tex]\qquad \tt \dashrightarrow \:0[/tex]
I hope this helps, if you find any problem with steps or got a mistake in my explanation then feel free to ask me ~
What is the interquartile range for 8 9 3 12 4 4 8 7 2 10
Answers
Answer: 5
Step-by-step explanation:
lower quartile: 4
upper quartile: 9
9-4=5
IQR=5
PLEASE HELP ME WITH THIS!!!! I BEG
Answers
Answer:
D. turns
Step-by-step explanation:
Rotation is the process of turning around a center or an axis.
(Sorry if it's wrong. I hope I helped somewhat.)
What is the interquartile range for 0,2,4,6,8,and 10
Answers
Answer:
6
Step-by-step explanation:
Find the interquartile range (h-spread).
:)
Milan deposits $4,000 into an account that pays simple interest at an annual rate of 2%. He does not make any more deposits. He makes no withdrawals until the end of 2 years when he withdraws all the money.
(a) How much total interest will Milan earn?
(b) What will the total amount in the account be (including interest)?
Answers
I=4000x 0.02 x 2
Total of $160 earned
B. 4000+160 = $4160 is the total amount after 2 years including interest
Upon review of production results, it was determined that 130 pieces out of 3,500 were "out of spec." What percent of the production was "out of spec"?
A. 0.03 percent .
B. 3.71 percent .
C. 30 percent
D. 37.1 percent
Answers
Answer:
Option B
Step-by-step explanation:
Given:
130 pieces of 3500 were out of specTo determine the percentage of the production was out of spec, we need to use the percentage formula (x/y × 100).
[tex]\implies \dfrac{x}{y} \times 100[/tex]
The value of "x" is the the number of pieces that were out of spec and the value of "y" is the total pieces in the production results.
[tex]\implies \dfrac{130}{3500} \times 100[/tex]
Simplify the expression to determine the percentage of the pieces that were out of spec.
[tex]\implies \dfrac{13000}{3500}[/tex]
[tex]\implies \dfrac{130}{35} = \dfrac{130 \div 5}{35 \div 5} = \dfrac{26}{7} = 3.714... \%[/tex]
When the percentage is estimated to nearest hundredth, we get 3.71%
(Option B)
Answer:
B) 3.71%
Step-by-step explanation:
[tex]\textsf{130 out of 3500}\sf =\dfrac{130}{3500}[/tex]
To convert to a percentage, multiply by 100:
[tex]\implies \sf \dfrac{130}{3500} \times 100\%=0.03714.. \times 100\%=3.71\%[/tex]
Help would be very appreciated!!
11 points
Answers
Answer:
29 candy bars
Step-by-step explanation:
13 movie pases= $9.50x13= $123.50
3 gift cards= $25×3 =$75
amount of money she has left over to buy candy bars = $250- $75- $123.5 = $51.50
Amount of candy bars she can buy = $51.50÷$1.75 = 29.43 candy bars, but u can only buy full candy bars and there for 29 candy bars is the final answer
60 point help What are domain restrictions of rational functions? What do domain restrictions mean for the graph of a rational function?
Answers
Answer:
1. The use of a domain for a function that is smaller than the function's domain of definition. Note: Restricted domains are commonly used to specify a one-to-one section of a function.
2. Domain restrictions can be calculated by finding singularities, which are the x -values for which the denominator Q(x) is zero.
Answer:
by setting the denominator equal to zero and solving. The x -values at which the denominator equals zero are called singularities and are not in the domain of the function.
Step-by-step explanation:
The figure is the net for a rectangular prism.
What is the surface area of the rectangular prism represented by the net?
Answers
Answer:
The answer that I got is 320
Step-by-step explanation:
multiply 16 and 6 then 16 and 8 then 8 and 6 and then 8 and 6 again then add them all up to get 320
Find the circumstance of a circle with the diameter of 13 meters use 3.14 as an approximation
Answers
Answer:
okay so the circumference is 40.82m
[tex]circumference = 2\pi \: \times r \\ = 2 \times 3.14 \times 6.5 \\ = 40.82m[/tex]
the diameter will be divided by 2 to give 6.5
Find the area of the shaded region. Round to the nearest hundredth where necessary. Hint: Could you find the radius?
Answers
Answer:
13.72 cm²
Step-by-step explanation:
The formula to find the area of a shaded region: Area of the bigger shape - area of the smaller shape.
The formula to find the area of a square: [tex]a^{2}[/tex], where [tex]a[/tex] is the side.
The formula to find the area of a circle: [tex]\pi r^{2}[/tex], where [tex]\pi[/tex] is 3.14 or [tex]\frac{22}{7}[/tex] or 3.142 or similar, [tex]r[/tex] is the radius (diameter ÷ 2).
1) Find the area of the circle using the formula. The radius is 4 because the diameter is 8 (8 ÷ 2 = 4).
= [tex]\frac{22}{7}*4^{2}[/tex]
= [tex]\frac{22}{7}*16[/tex]
= 50.285
2) Find the area of the square using the formula.
= [tex]8^{2}[/tex]
= 64
3) Apply: area of the bigger shape - area of the smaller shape.
= 64 - 50.285
= 13.715
4) Round it off to the nearest hundredth.
= 13.72
Please help! Refer to the image below.
Answers
If u = ⟨-4, 8⟩ and v = ⟨5, -18⟩, then we have
2u - 4v = ⟨-8, 16⟩ + ⟨-20, 72⟩ = ⟨-28, 88⟩
To this vector, we want to add another vector w = ⟨a, b⟩ such that
2u - 4v + w = ⟨0, 1⟩
Solve for w :
w = ⟨0, 1⟩ - ⟨-28, 88⟩ = ⟨28, -87⟩ … … … [C]
Which function is equivalent to g(x)= x2 +11x-60?
Answers
g(x) = x^2 + 11x - 60
(a=1, b=11, c=-60)
To solve this quadratic equation we need to find the discriminant:
discriminant= b^2 - 4ac
= (11)^2 - 4(1)(-60)
=121 - (-240) = 121+240 =361
(if discriminant<0 then equation has no real root
if discriminant=0 then equation has 1 real root
if discriminant>0 then equation has 2 real roots)
Here we have discriminant=361>0 so we have 2 real roots:
x1=(-b-redical discriminant) / 2a
and x2=(-b+redical discriminant) / 2a
x1= (-11-redical(361)) / 2(1)
=-15
x2= (-11+redical(361)) / 2(1)
=4
So we get the two roots x= -15 and x= 4
To write the quation in factorized form:
x= -15 means that x+15=0
x= 4 means that x-4=0
Therefore g(x)= (x+15)(x-4)
D is the correct answer
HOPE THIS HELPS :)
Segments that join oppsoite vertices in a quadrilateral are called what
Answers
Answer:
Diagonal, I'm 90% sure it is at least!!
Lisa cut out 36 paper snowflakes to decorate her room.
Then her brother gave her 28 paper snowflakes that he had made.
If she chooses to use only half of the snowflakes to decorate, how many will
she have left over?
Answers
Answer: 32
Step-by-step explanation:
We know that the original number of paper snowflakes was 36, plus 28 given by her brother. The new total would be 64 paper snowflakes and she only uses half of the paper snowflakes. The answer would be 32.
Question 1 of 10
How many solutions are there to the equation below?
x = -5
A. 2
B.1
C.0
D.25
Answers
Answer:
Answer is either 1 or 2
Step-by-step explanation:
what is inbetween 120 and 140
Answers
Answer:
130
Step-by-step explanation:
In the middle is (120 + 140)/2 = 130 (this is the average of these two numbers)
121 122 123 124.....138, 139 are all 'in between'
Answer:
130
Step-by-step explanation:
It's kinda like half, for example, 1 through 10, and there would a five in the middle, it's like halfway done with something.2) A bus left the bus depot at 11:45am. It arrived at its destination at 12:25pm. How long did the journey take?
Answers
Answer:
40 minutes
Step-by-step explanation:
11:45 plus 40 minutes = 12:25
If The radius of a quarter circle is 3 miles. What is the quarter circle's perimeter?
Answers
Answer:
6pi miles
Step-by-step explanation:
Answer: 6pi
formula for perimeter: pi*diameter
diameter=radius*2
diameter=3*2=6
6*pi=6pi
Henry was thinking of a number. Henry adds 2, then divides by 5 to get an answer of -10. What was the original number?
Answers
-50 / 5 = -10
Need help with 115/120 please and thank you
Answers
Answer:
115: a) -4
120: a) 11
Step-by-step explanation:
115: Use the formula
[tex]m = \frac{rise}{run} = \frac{y_{2} - y_{1} }{x_{2} - x_{1} }[/tex]
= (-5)-(3) / (6) - (4)
= -8 / 2
= -4
120: Count the units between point B and point F
Hi pls help me guys help me this is my last chance pls guys help Use the data in the table to estimate the likelihood that a person has each eye
color. Which statement is not true?
Answers
Answer:
C. The likelihood of having brown eyes is 35%
Step-by-step explanation:
Add the total number of people, which gives you 50.
To find the percent of brown-eyed people out of 50, divide 35 by 50, then multiply the result (0.7) by 100 to get 70%.
70% of people are brown-eyed, thus, C is a false statement.
Answer:
the answer is C
Step-by-step explanation:
the brown eyes would be 70 percent actually
What number increased by ¼ of itself is equal to 30?
Answers
Answer:
x = 24
Step-by-step explanation:
let x be the number we want to determine its value
The statement x increased by ¼ of itself is equal to 30
is equivalent to :
[tex]x + \frac{x}{4}=30\\\\then[/tex]
[tex]\frac{4x+x}{4} = 30\\\\then[/tex]
[tex]\frac{5x}{4} = 30\\\\then[/tex]
5x = 4× 30
then
5x = 120
then
x = 120/5
then
x = 24
NO LINKS WHATSOEVER!!! SPAMMERS WILL BE IMMEDIATELY REPORTED!!! NO BOTS!!! NO COPYING OFF WEBSITES!!! USE YOUR OWN BRAIN!!! A gardener plants a row of eight trees chosen from three maples, two oaks, and four birches. In how many ways can he plant the row?
Answers
Answer:
13 i got it right on khan
Step-by-step explanation:
Use the associative property to rewrite the expression: -6+(3+7)
Answers
Okie help help help math math
Answers
Answer:
the answer is x>5 please. rate. me. brainliest
Answer:
x>3
x greater then 3 ..........
Question 3 on math!
Please help me 15 points
Answers
Answer:
2nd one
Step-by-step explanation:
if you were to look on a grid the slope would point up
2x<5x-15 Solve check use x = 10)
Answers
Answer:
x= -5
Step-by-step explanation:
not right its -5
50 paise × 1000 give your answer in rupees
Answers
Answer:
10 rs
Step-by-step explanation:
I hope it's helpful for you15 x 18 + 12 ÷ 3 + 9
1. 15 x 18 =270
2. 270 + 12 divided by 3 + 9
3. 12 divided by 3 = 4
4. 270 + 3 + 9
5. 270 + 3= 273
6. 273 + 9 = 282
The answer is 282.
Answers
Answer:
283
Step-by-step explanation:
[tex]15 \times 18 + 12 \div 3 + 9 \\ 270 + 4 + 9 \\ 283[/tex]
By using BODMAS rule
Before adding the 12 u have to divide 12 by 3 =4 then u will add 4
Answer:
Your wrong the correct answer is 283
Step-by-step explanation:
[tex]15 \times 18 + 12 \div 3 + 9 \\ = 270 + 4 + 9 \\ = 283 \\ [/tex]
{ The algorithm, multiplication and division comes first, then addition}