pilot error = 25.9%
The most serious threat to aviation safety is pilot error. Pilot error accounts for 25.9% of all fatal plane crashes during the past 70 years, making it the most prevalent threat. Fortunately, there are measures that can be taken to reduce pilot error, such as providing pilots with additional training and stricter qualifications.
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A sample of students is taken from the school's A honor roll. The school estimates there are 360 students on the A honor roll. How many students on the A honor roll are 7th graders?
Combine the terms that can be combined. Indicate the others in descending powers of x or a.
21. 720 + 40-60-120 + 15 =
24. 3x² - 2xy + 4x²-3xy + y² =
22. 25ab +6a²-3b² +6=
25. 2x + x + 25y-y-4=
23. 3a+2b-3a + 1-3 =
The functions are arranged/combined as follows
21. 595
22. 6a² + 25ab - 3b² + 6
23. 2b - 2
24. 7x² - 5xy + y²
25. 3x - 24y - 4
How to combine the terms that can be combined or indicate in descending powers of x or aDescending powers involves making the highest power to be the first term
The equations are solved one after the other as follows
21.
720 + 40 - 60 - 120 + 15 = 595
22.
25ab + 6a² - 3b² + 6 =
6a² + 25ab - 3b² + 6
23.
= 3a + 2b - 3a + 1 - 3
= 3a - 3a + 2b + 1 - 3
= 2b - 2
24.
= 3x² - 2xy + 4x² - 3xy + y²
= 7x² - 5xy + y²
25.
= 2x + x + 25y - y - 4
= 3x - 24y - 4
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Work out the equation of the straight line that passes through (5, 4) and (8, 19). Give your answer in the form y = mx + c, where m and c are integers or fractions in their simplest forms.
Answer:
y = 5x - 21
Step-by-step explanation:
the equation of a line in slope- intercept form is
y = mx + c ( m is the slope and c the y- intercept )
calculate m using the slope formula
m = [tex]\frac{y_{2}-y_{1} }{x_{2}-x_{1} }[/tex]
with (x₁, y₁ ) = (5, 4 ) and (x₂, y₂ ) = (8, 19 )
m = [tex]\frac{19-4}{8-5}[/tex] = [tex]\frac{15}{3}[/tex] = 5 , then
y = 5x + c ← is the partial equation
to find c substitute either of the 2 points into the partial equation
using (5, 4 ) , then
4 = 5(5) + c = 25 + c ( subtract 25 from both sides )
- 21 = c
y = 5x - 21 ← equation of line
Jodie has c pieces of candy. She gives away 11 of the pieces. Write an expression that shows the number of pieces of candy Jodie has left
The expression which represents the number of pieces of candy left with Jodie is given by c - 11 .
Original number of pieces of candy with Jodie is equal to 'c'.
Number of pieces of candy Jodie gives away is equal to 11.
Expression used to represents the number of pieces of candy left with Jodie is written as,
Subtract 11 from the original number of candy
= ( c - 11 )
Therefore, the representation of the expression for number of pieces of candy left with Jodie after she gives away 11 candy is equal to ( c - 11 ).
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4.02 Lesson check ! (8)
The difference is not constant, the sequence is not arithmetic.
What exactly is an algebraic sequence?An arithmetic sequence is a set of integers where each term is created by multiplying the preceding term by a fixed constant value (known as the common difference). A constant rate of change is modelled by arithmetic sequences in fields like engineering, physics, and financial computations.
For the given series we need to determine if the sequence is arithmetic, by checking difference between consecutive terms is constant.
9 - 7 = 2
12 - 9 = 3
16 - 12 = 4
Since the difference is not constant, the sequence is not arithmetic.
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On the day that certain crlebrity proposes marriage 10 peoplesknow aboutb it. Each day afterward the number of people who knows triples
Write a function that give the total number n(t) of people who know about the celebrity proposing t days after thecelebrity propose
N(t)=
the total number of people who know about the proposal 5 days after it was announced is 810.
The term [tex]3^ (t-1)[/tex] represents the number of people who find out about the proposal on day t, which is equal to three times the number of people who knew about it on the previous day. The initial value of 10 represents the number of people who knew about the proposal on the first day.
For example, if we want to find out how many people know about the proposal 5 days after the celebrity proposes, we can plug t=5 into the formula:
N(5) =[tex]10* 3^(5-1)[/tex] = [tex]10*3^4[/tex] = [tex]10*81[/tex] = 810
So the total number of people who know about the proposal 5 days after it was announced is 810.
the complete question is :
Assuming that the 10 people who know about the proposal on the first day do not forget or tell anyone else, we can use the following function to calculate the total number of people who know about the proposal t days after the celebrity proposes:
N(t) = [tex]10 * 3^(t-1)[/tex]
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Please help! Algebra Math!
Rhonda kept track of the cats at a shelter where she volunteers. She measured how many times per day each cat ate, and she also ranked their activity level on a scale from 1 to 10 each day. She found the line of best fit for the data has the equation y=0. 23x+4. 1, where x represents the activity level and y represents the number of meals eaten.
If a cat had an activity level of about 9, then it's likely to have eaten about _[blank]_ meals.
Enter the value that correctly fills in the blank.
Round to the nearest whole number, if necessary, like this: 42
A cat would probably have consumed about 6 meals if its activity level had been around 9.
A linear equation is a relation between two variables in which one is dependent on the other in such a manner that changing one of the variables causes the change in another variable "linearly".
The above statement can be represented mathematically as,
y=mx+b
where m represents the rate of the change and c is the initial value of the equation.
Let x stand for activity level and y for the number of meals consumed. Therefore:
y = 0.23x + 4.1
For an activity level of 9, we will put x as 9:
y = 0.23(9) + 4.1 = 6.17
Thereby, we can say that If a cat had an activity level of about 9, then it's likely to have eaten about 6 meals.
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Solve using substitution method
2x+y=12, 3x-7y=1
follow the steps in the picture above
Step-by-step explanation:
look the ans it will make you clear about substitution method clear
Find the area of the shaded sectors. Round to one decimal place. EB = 10,4 A=4
360
A
D
A=(
E
143
B
C
The answer of the given question based on finding the area of the shaded sectors the answer is approximately 18.8 + 4.2 = 23.0 square units.
What is Angle?An angle is geometric figure formed by the two rays or lines that share common endpoint, called vertex. The rays or lines are often referred to as arms or sides of angle
We need to know the central angles of each sector. We can find these angles by using the formula:
angle = (arc length / radius) * (180/π)
where π is pi, approximately equal to 3.14.
Therefore, we can use trigonometry to find angle EOB:
sin(EOB) = EB/OA
sin(EOB) = 10.4/8
EOB = sin^-1(10.4/8)
EOB ≈ 56.7° degrees
Since angle EOA is a right angle, we know that angle AOB is 90° degrees, so angle AOE is 90 - EOB = 33.3° degrees.
Now, we can find the area of each sector using the formula:
area = (angle/360) * π * r²
Area of shaded sector ADE:
angle AOE = 33.3° degrees
radius = OA = 8
area = (33.3/360) * π * 8²
area ≈ 18.8 square units
Area of shaded sector EBC:
angle EOB = 56.7° degrees
radius = EB/2 = 5.2
area = (56.7/360) * π * 5.2²
area ≈ 4.2 square units
Therefore, the total area of the shaded sectors is approximately 18.8 + 4.2 = 23.0 square units.
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The arithmetic calculations and statistical procedures for (a) the test of homogeneity and (b) the test of independence are the same.
a) Explain in a few sentences what distinguishes these two hypothesis tests.
b) To illustrate your answer in part (a), make up an example of a research question that would require a test of homogeneity, and an example that would require a test of independence. Briefly describe the aspects of your examples that illustrate the distinguishing characteristics you mentioned in part (a).
a) These two hypothesis tests differ in terms of their research questions, assumptions, and the types of variables that are involved in each test.
The arithmetic calculations and statistical procedures for (a) the test of homogeneity and (b) the test of independence are not the same. They are different from each other. These two hypothesis tests differ in terms of their research questions, assumptions, and the types of variables that are involved in each test. This is because they deal with different types of data. Below are the examples of a research question that would require a test of homogeneity and an example that would require a test of independence. These examples show the distinguishing characteristics that are involved in each of these tests. Research question that would require a test of homogeneity: A researcher would like to determine whether there is any significant difference between the proportions of men and women who voted for the two main political parties in an election. The research question can be framed as follows: Are the proportions of men and women who voted for the two main political parties homogenous or different? Assumptions: Samples are independent, observations are nominal or categorical, and the variable of interest has more than two categories (i.e., nominal or ordinal).Test of homogeneity:It is used to determine whether two or more populations have the same proportion or distribution of a nominal or categorical variable.Example that would require a test of independence:A researcher is interested in knowing whether there is any relationship between gender and drug addiction among high school students in a particular area. The research question can be framed as follows: Is there a relationship between gender and drug addiction among high school students?Assumptions:Samples are independent, observations are nominal or categorical, and the variable of interest has only two categories (i.e., nominal).Test of independence: It is used to determine whether there is any relationship between two nominal or categorical variables.
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HELP MEEEEEEEE
20 POINTS
Answer: 61 N
Step-by-step explanation:
18+15+28=61
A streaming service charges $200 to download a digital song as well as a $4.99
membership fee. Which expression below gives the total cost in dollars to join the
streaming service and download games. Remember the charge is $2.00 per game plus
a membership fee of $4.99.
A.4.99n
B.n+4.99
C.2n +4.99
D.I don't know how to
do this.
The expressiοn calculates the tοtal cοst οf membership and game dοwnlοads. Sο, the cοrrect οptiοn is (C) 2n + 4.99.
Describe Algebraic Expressiοn?Algebraic expressiοns can include οne οr mοre variables, which are typically represented by letters, such as x, y, οr z. These variables can be used tο represent unknοwn quantities οr tο express relatiοnships between different quantities in a prοblem.
Algebraic expressiοns can alsο include cοnstants, which are fixed numbers, and cοefficients, which are the numbers that multiply the variables in the expressiοn. Fοr example, in the algebraic expressiοn 3x + 2y, the cοnstants are 3 and 2, and the cοefficients are 3 and 2, respectively.
The given prοblem describes twο different charges: a οne-time charge οf $200 tο dοwnlοad a digital sοng, and a membership fee οf $4.99 that must be paid regardless οf hοw many sοngs οr games are dοwnlοaded. Additiοnally, fοr dοwnlοading games, there is a charge οf $2.00 per game.
Therefοre, the tοtal cοst in dοllars tο jοin the streaming service and dοwnlοad games can be represented by the expressiοn:
2n + 200 + 4.99
Here, "n" represents the number οf games dοwnlοaded, and the expressiοn calculates the tοtal cοst οf membership and game dοwnlοads.
Sο, the cοrrect οptiοn is (C) 2n + 4.99.
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Laila needs a new bike mirror. Her old mirror was a square with a side length of 7 cm. She wants
the new mirror to have approximately the same area as her old bike mirror.
Which circular bike mirror should Laila buy?
4 cm
7 cm
8 cm
Answer:
Approximately 4 cm
Step-by-step explanation:
Old mirror's area = S X S = 7 x 7 = 49cm2
Area of old mirror = Area of new mirror
49 = πr2
49 = 22/7 * r2
[tex]\frac{49 * 7}{22}[/tex] = r2
[tex]\frac{343}{22}[/tex] = r2
15.5909 = r2
r = [tex]\sqrt{15.5909}[/tex]
r = 3.948 cm = approx. 4cm
Hope it helps.
The number, 19/7, is what number
Answer: a rational number
The following chips are placed in a bucket 5 white, 1 yellow, 2 blue, and 1 green. One chip is randomly selected from the bucket.
What color chip has the best chance of getting selected?
Answer: So,
If we add them together, we get
5 + 3 + 4 + 1 = 13
Since there are 4 blue chips, the probability would be 4 out of the total number of chips, or 4/13.
Step-by-step explanation: Hope this helps! <3
The polygons below are similar, but not necessarily drawn to scale. Find the values of x and y. (Does anybody know how to do all, or at least most of the work out?)
Step-by-step explanation:
They are similar....so they are scaled
to go from side 16 on the left figure to the corresponding side 12 on the right figure ,
multiply by .75
so .75 ( y+1) = 21
.75 y + .75 = 21
y = 27
Similarly : .75 ( x-1) = 6
.75x - .75 = 6
x = 9
Determine a series of transformations that would map polygon ABCDE onto polygon A'B'C'D'E'?
Given: LK congruent NM,Kj congruent Mj
Prove: LT congruent NJ
PLS PLS PLS HELP IM FAILING GEOMETRY RNNNNN
By the Definition of congruent property, we have proved that:
VW ≅ VX
Congruent Property:
The three properties of congruence are the reflexive property of congruence, the symmetric property of congruence and the transitive property of congruence. These properties can be applied to line segments, angles, triangles, or any other shape.
Given: VZ ≅ VY and WY ≅ XZ
Prove: VW ≅ VX
Proof:
(Given): VZ ≅ VY and WY ≅ XZ
By the Definition of Congruent Substitute:
VZ = VY and WY = XZ
⇒ VZ = VX + XZ , and,
VY = VW + WY
By Substituting
VX + XZ = VW + WY
Again,
VX + WY = VW + WY
Now,
By Subtraction property of Equality
VX = VW
VW = VX (Definition of congruent property.)
Complete Question:
IF VZ congruent of VY and WY congruent of XZ. Prove that VW is Congruent of VX.
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-2 -1
X=0
YA
X=3
15
4
3
2
T
y = x²
2
3
4
y = (x-3)²
5 6
M
What are the coordinates for the x-
intercepts shown above?
XA
Answer:
what are the coordinator position y
a 25-ft long ladder is leaning against the wall of a house when its base starts to slide away. the base of the ladder is moving away from the house at the rate of 2 ft/sec. how fast is the top of the ladder sliding down the wall when its base is 15 feet from the wall?
The top of the ladder is sliding down the wall at the rate of 1.5 ft/s.
Given: A ladder is 25 ft long and is leaning against the wall of a house.
The base of the ladder is sliding away from the house at the rate of 2 ft/sec.
Asked: How fast is the top of the ladder sliding down the wall when its base is 15 feet from the wall?
Let the distance of the top of the ladder from the wall be x ft.
Then we have,
x² + y² = 25² (by Pythagoras theorem)
Differentiating both sides with respect to time t,
we get, 2x(dx/dt) + 2y(dy/dt) = 0 ...(1)
Given dx/dt = 2, and x = 15 ft.
⇒ 2(15)(dx/dt) + 2y(dy/dt) = 0
⇒ 30 × 2 + 2y(dy/dt) = 0 (substituting the given values)
⇒ 2y(dy/dt) = - 60⇒ dy/dt = - 30/ y
The negative sign indicates that y is decreasing (getting smaller) with time.
The values of y are negative because it lies below the level of the ground.
Substituting the value of x = 15 in the equation x² + y² = 25², we get
15² + y² = 25²
⇒ y² = 25² - 15² = 400
⇒ y = - 20
Substituting the values of dy/dt and y in the above equation, we get,
dy/dt = - 30/ (- 20)
dy/dt = 1.5 ft/s
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Urgent help is needed
a. The triangle can be sketched as shown in the attached image.
b. The side length OE is 4√11 inches
c. The measure of ∠G is 27.82°
How to calculate the side length OE?
a. The triangle can be sketched as shown in the attached image.
b. We can use Pythagoras theorem to calculate the side length OE. That is:
OE = √(15² - 7²)
OE = 4√11 inches
c. Using trig. ratio:
sin G = (4√11)/15 (opposite/hypotenuse)
sin G = 0.8844
G = sin⁻¹ (0.8844)
G = 27.82°
Thus, the measure of ∠G is 27.82°
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A. Please see attached photo for diagram
B. The length of side OE is 13 inches
C. The measure of of angle G, ∠G is 62°
B. How do i determine the length of OE?We can obtain the the length of OE by using Pythagoras theorem as shown below:
Length OG = 15 inchesLength GE = 7 inchesLength OE =?OE² = OG² - GE²
OE² = 15² - 7²
OE² = 225 - 49
OE² = 176
Take the square root of both sides
OE = √176
OE = 13 inches
Thus, the length of OE is 13 inches
C. How do i determine the angle G?The value of angle G, ∠G can be obtained as follow:
Hypothenuse = 15 inchesAdjacent = 7 inchesAngle G =?Cos G = Adjacent / Hypothenuse
Cos G = 7 / 15
Cos G = 0.4667
Take the inverse of Cos
G = Cos⁻¹ 0.4667
G = 62°
Thus, angle G is 62°
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Question content area top
Part 1
At a factory, two machines pack bottles into boxes for shipping. Machine A can pack 8 boxes per minute, and Machine B can pack 11 boxes per minute. Both machines have been packing boxes for some time, and the difference between the number of boxes that Machine B has packed and the number of boxes that Machine A has packed is less than 200. Write and solve an inequality to find the possible lengths of time to the nearest second that the machines have been working. Describe the possible solutions.
Machines A and B worked for 66 minutes and 6 seconds.
What are inequalities:An inequality is a mathematical statement that compares two quantities using one of the inequality symbols: "<" (less than), ">" (greater than), "<=" (less than or equal to), ">=" (greater than or equal to), or "≠" (not equal to).
Inequalities can be solved just like equations, with the goal of finding the set of values that satisfy the inequality.
Here we have
Machine A can pack 8 boxes per minute, and Machine B can pack 11 boxes per minute.
Let Machines A and B work for 'x' minutes
Number of boxes packed by Machine A = 8x
Number of boxes packed by Machine B = 11x
The difference between the number of boxes that Machine B has packed and the number of boxes that Machine A has packed is less than 200.
=> | 11x - 8x| < 200
=> 3x < 200
Divide by 3 into both sides
=> 3x/3 < 200/3
=> x < 66.67
=> x < 66.6
Therefore,
Machines A and B worked for 66 minutes and 6 seconds.
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What is the exponential regression equation that fits these data?
X
y
1
4
2
8
3
27
4
85
5
250
6
600
The exponential regression equation that fits the given data points is y = [tex]4*3^(x-1).[/tex]
The exponential regression equation that fits these data is y = 4*3^(x-1). To calculate this, we need to first calculate the parameters a and b for the equation y = a*b^x. We can do this by finding the natural logarithm (ln) of both sides of the equation.
ln(y) = ln(a*b^x)
ln(y) = ln(a) + ln(b^x)
ln(y) = ln(a) + x*ln(b)
We can now calculate the parameters a and b by plotting the points (x, ln(y)) and performing a linear regression on the points.
ln(4) = 0.602
ln(8) = 2.079
ln(27) = 3.526
ln(85) = 4.443
ln(250) = 5.52
ln(600) = 6.398
The linear regression equation is ln(y) = 0.175x + 0.602. We can now solve for the parameters a and b by using the linear regression equation.
ln(a) = 0.602
a = e^0.602
a = 4
ln(b) = 0.175
b = e^0.175
b = 3
Therefore, the exponential regression equation that fits these data is y = 4*3^(x-1).
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Demonstrate the property listed in the first column of the table by filling in the box in the second column of the table with an equivalent expression. Commutative Property of Addition Commutative Property of Multiplication gx h= Additive Identity Property of Zero n + 34 = Multiplicative Identity Property of One S+0= bx1 =
The property listed in the first column of the table by filling in the box in the second column of the table with an equivalent expression are: 1. Commutative Property of Addition 2. Additive Identity Property of Zero 3. Multiplicative Identity Property of One.
What is expression?An expression is a combination of numbers, variables, and mathematical operations such as addition, subtraction, multiplication, and division. It represents a value or quantity and can be evaluated or simplified to a single value or another expression. Expressions can contain constants, which are fixed values, such as the number 5 or the symbol π, or variables, which are symbols that represent varying values, such as x or y.
Here,
Commutative Property of Addition: The order in which two numbers are added does not change the result.
For example:
g + h = h + g
Additive Identity Property of Zero: Adding zero to any number does not change the value of the number.
For example:
n + 34 = n
Multiplicative Identity Property of One: Multiplying any number by one does not change the value of the number.
For example:
S * 1 = S
Commutative Property of Multiplication: The order in which two numbers are multiplied does not change the result.
For example:
b * x * 1 = x * b * 1
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E) Let y = g(x) be the particular solution to the differential equation dy/dx= 3sin(pix)/2y with initial condition
g(1/2)=3. Then g(x)= sqare root of a+bcos(pix) where a and b areconstants. Find a
Answer:
9
Step-by-step explanation:
You want the value of the constant 'a' in the solution y=√(a+b·cos(πx)) to the differential equation y'=3sin(πx)/(2y) with initial condition y(1/2) = 3.
Initial conditionSubstitute the initial condition into the equation for y:
y = 3 . . . . when x = 1/2
y = √(a +b·cos(πx))
3 = √(a +b·cos(π/2)) = √a
3² = a = 9
The value of a is 9.
__
Additional comment
The value of 'b' is -3/π.
It can be found by putting the equation for y in the original differential equation, and solving for b.
Please ASAP Help
Will mark brainlest due at 12:00
Answer:
plot the point at 1
Step-by-step explanation:
Answer:
(1,0)
Step-by-step explanation:
S = (-7,0)
T = (3,0)
W = (x,0)
can you please help
Solve 3X+1
Answer: The answer is 3
Step-by-step explanation:
3x+1 take one minus one.
3x1-1 1-1 for exponents value becomes 0
3x0 for every term 0 is = to one in a exponent value so it become 3x1
3x1 = 3
So the answer is 3..
Step-by-step explanation:
In the 3x+1 problem, no matter what number you start with, you will always eventually reach 1. The problemproblm has been shown to be a computationally unsolvable problem.
An angle measuring (468n)° is in standard position. For which value of n will the terminal side fall on the x-axis?
n = 4
n = 5
n = 6
n = 7
Answer:
n=5
Step-by-step explanation:
Standard Position of the Angle =(468 n)°
We have to find that value of, n for which terminal side will fall on X axis, that is the angle should be multiple of 180°.
You must be thinking why not multiple of ,360°, because factors of 360 are , 90,180,and 360, in which , multiple of 90 falls on x and y axis ,and multiple of 180 ,falls on X axis only.So, instead of taking factors of 90 or 360, you should take multiple of 180° for which terminal side fall on the x-axis.
The Unit Digit of , (468 n)°,should be equal to 0, as it is divisible by number 180°.
For, n=5,
→468° × 5=2340°
So, 2340° , is divisible by 180°.
For, n=5, the terminal side ,the angle having Measure (468 n)°,will fall on the X axis.
Ken lives at the point between the school and the pet shop, How far away is Ken’s house from the park
The answer to this question is that it depends. The distance of Ken’s house from the park cannot be determined without knowing the distance of the school and the pet shop from the park, and other factors such as terrain, local roads, and traffic can also affect the distance between Ken’s house and the park.
What is distance?Distance is the amount of space between two points. It is a physical quantity that can be measured in various units such as meters, kilometers, miles and light-years. Distance can be calculated using the formula d = s × t, where d is the distance, s is the speed, and t is the time.
Ken lives at a point between the school and the pet shop, so it is impossible to answer this question without knowing how far away the school and the pet shop are from the park. If the park is close to the school or the pet shop, then Ken’s house would be close to the park, but if the park is further away from the school or the pet shop, then Ken’s house would be further away from the park. Therefore, the distance of Ken’s house from the park cannot be determined unless the distances of the school and the pet shop from the park are known.
In addition, other factors such as terrain, local roads, and traffic can also affect the distance between Ken’s house and the park. For example, if there is a hilly terrain between Ken’s house and the park, then the distance between them may be greater than if the terrain were flat.
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