Answer:
Guess and Conjecture is the answers that apply.
Also known as B. and C.
on a railway line, peak ridership occurs between 7:00 am and 5:00 pm. the fairness of a passenger survey could be improved by over-sampling data from which group?
The fairness of a passenger survey could be improved by oversampling data from the group of passengers who travel during peak ridership hours between 7:00 am and 5:00 pm.
This will ensure that the survey adequately represents the population of interest and provides accurate results.
Oversampling is the method of selecting respondents so that some groups make up a larger share of the survey sample than they do in the population. Oversampling small groups can be difficult and costly, but it lets polls to shed light on groups that would otherwise be too small to report on.
Oversampling and undersampling are methods used in data mining and data analytics to change unequal data classes to create balanced data sets. Oversampling and undersampling are also known as resampling.
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Don’t answer this question?
Answer:
Why not and what??
Step-by-step explanation:
wait why is that and also that not even a question
use property 8 to estimate the value of the integral ∫1147xdx.
Using property 8 and the midpoint rule, we have estimated the value of the integral ∫1147xdx to be approximately 14.
Property 8 of the definite integral states that if a < b and 0 < c < d, then:
∫baf(x)dx = ∫dcf(x)dx - ∫caf(x)dx
We can use this property to estimate the value of the integral ∫1147xdx. Let's choose c = 1 and d = 4, so that 0 < c < d and a < b. Then:
∫1147xdx = ∫447xdx - ∫11x dx
Next, we can use a numerical method, such as the midpoint rule or trapezoidal rule, to estimate the value of each of the integrals on the right side of the equation.
For example, using the midpoint rule with n = 4 subintervals for each integral:
∫447xdx ≈ (4 - 4/2) + (4 - 3/2) + (4 - 2/2) + (4 - 1/2) = 4 + 4 + 4 + 4 = 16
∫11x dx ≈ (1 - 1/2) + (1 - 2/2) = 1 + 1 = 2
So, our estimate of ∫1147xdx becomes:
∫1147xdx ≈ 16 - 2 = 14
Therefore, using property 8 and the midpoint rule, we have estimated the value of the integral ∫1147xdx to be approximately 14.
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You want the banner you are creating form one piece of cloth to be a golden rectangle. The clothe will be cut from a bolt that is 54 in wide. What are the dimensions
of the largest banner that you can make? Golden Ratio 1.618/1
54 in by
The dimensions of the largest banner are 54 inches by 87.372 inches.
What is a golden rectangle?A dividable rectangle is referred to as a "golden rectangle." into shapes that are similar to the original square and rectangle. Repeated golden rectangles form a pattern. displayed to the right. Each produced golden rectangle is duplicated and divided once more. All of the golden rectangles are like the original rectangle in shape.
Given a golden rectangle,
width of rectangle = 54 inch
let length be l,
according to the golden ratio,
l/b = 1.618/1
l = 1.618b
l = 1.618*54
l = 87.372 inches
Hence the dimensions are 54 inches by 87.372 inches.
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Gabriella measured a line to be 11.1 inches long. If the actual length of the line is 11.6 inches, then what was the percent error of the measurement, to the nearest tenth of a percent
Answer:
10%
Step-by-step explanation:
11.6/11.1 = 0,1045045
If angle b is two more than three times angle c, angle b and c are complimentary what is the measure of each angle
Step-by-step explanation:
"∠B is 2 more than 3 times the measure of ∠C" translates into B = 3C + 2....(1)
"...∠B and ∠C are complementary angles" translates to B + C = 90...............(2)
Now, all that's left to do is to solve for B and C. So, we'll take equation (1) and substitute it into equation (2) as follows:
(3C + 2) + C = 90
4C + 2 = 90
4C = 88
C = 22
Plugging C = 22 back into either equation (1) or (2) gives us
B = 90 - 22 = 68 (or B = 3(22) + 2 = 68)
Thus, ∠B = 68º; ∠C = 22º
Write the following decimal number using numerals: nine and seven hundredths
The nine and seven hundredths can be written as 9.07. The solution has been obtained by using decimals.
What are decimals?
Decimals are a form of number in algebra that have a full integer and a fractional portion separated by a decimal point. The decimal point is the dot that separates the whole number from the fractional element of the number.
We are required to write the decimal number of the given words by considering the integral part and the decimal part
So, here the integral part is nine i.e. 9 and the decimal part is seven hundredths i.e. 7/100 = 0.07
Now, after adding both the parts, we get
9 + 0.07 = 9.07
Hence, the nine and seven hundredths can be written as 9.07.
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Write a system of equations to describe the situation below, solve using substitution, and fill in the blanks. Jon and Felipe just had business cards made. Jon's printing company charged a one-time setup fee of $10 and then $20 per box of cards. Felipe, meanwhile, ordered his online. They cost $21 per box. There was no setup fee, but he had to pay $9 to have his order shipped to his house. By coincidence, Jon and Felipe ended up spending the same amount on their business cards. How much did each spend? How many boxes did each buy? Jon and Felipe each spent $ on business cards, buying boxes.
Jon bought 10.5 boxes of cards and Felipe bought 11 boxes of cards, and Jon and Felipe each spent $215 on business cards.
What is the system of equations?
A system of linear equations is a set of two or more equations that includes common variables. To solve a system of equations, we must find the value of the unknown variables used in the equations that must satisfy both equations.
Let x be the number of boxes of cards that Jon bought and y be the number of boxes of cards that Felipe bought.
The equation for Jon's cost is: 10 + 20x = y * (21 + 9)
The equation for Felipe's cost is: 21y + 9 = 10 + 20x
We will solve the system of equations using substitution.
Starting with the second equation, we can simplify: 21y + 9 = 10 + 20x
21y + 9 - 10 = 20x
21y - 1 = 20x
Dividing both sides by 21: y = (20/21)x + 1
We can now substitute this expression for y into the first equation:
10 + 20x = (20/21)x + 10 + 9
10 + 20x = (20/21)x + 19
10 = 19 - (20/21)x
Multiplying both sides by 21:
210 = 19 * 21 - 20x
Subtracting 19 * 21 from both sides:
210 - 19 * 21 = -20x
Divide both sides by -20:
x = 10.5
So, Jon bought 10.5 boxes of cards and Felipe bought (20/21) * 10.5 + 1 = 11 boxes of cards.
To find out how much each spent, we can plug these values back into either equation:
Jon's cost: 10 + 20 * 10.5 = 215
Felipe's cost: 21 * 11 + 9 = 250
So, Jon and Felipe each spent $215 on business cards, buying 10.5 boxes.
Hence, Jon bought 10.5 boxes of cards and Felipe bought 11 boxes of cards, and Jon and Felipe each spent $215 on business cards.
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draw the recursion tree for ()=4( 2) , where c is a constant, and provide a tight asymptotic bound
The tight asymptotic bound for the function f(n) = 4f(n/2) + c is T(n) = O(n²).
A recursion tree is a graphical representation of a recursive function that shows the repeated calls of the function. The tree is constructed by expanding each call of the function into a separate node.
For the given function f(n) = 4f(n/2) + c, the recursion tree is attaced below:
f(n/4) f(n/4) f(n/4) f(n/4)
The height of the tree is log2(n), and at each level, there are 4 calls of the function. Hence, the total number of nodes in the tree would be [tex]4^{log2(n)} = n^2[/tex].
The tight asymptotic bound for the function can be found using the Master Theorem, which states that for a recurrence relation of the form T(n) = aT(n/b) + f(n), if f(n) = O([tex]n^c[/tex]) for some constant c, then T(n) = O([tex]n^d[/tex]), where d = max(c, log b(a)).
For this function, a = 4, b = 2, and c = 1. Hence, d = max(1, log2(4)) = max(1, 2) = 2. Thus, the tight asymptotic bound for the function is T(n) = O([tex]n^2[/tex]).
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The following plane is in 3-space with equation
c1x+c2y+c3z+c4 =0
that passes through three noncollinear points (x1, y1, z1), (x2, y2, z2) and (x3, y3, z3) is given by the determinant equation
x y z 1
x1 y1 z1 1 = 0.
x2 y2 z2 1
x3 y3 z3 1
What does this determinant equation become if the three distinct points are collinear?
The equation of a plane in 3-space with equation c1x + c2y + c3z + c4 = 0 can be determined by passing through three non-collinear points (x1, y1, z1), (x2, y2, z2), and (x3, y3, z3). This is given by the determinant equation:
Copy code
| x y z 1 |
| x1 y1 z1 1 | = 0.
| x2 y2 z2 1 |
| x3 y3 z3 1 |
However, if the three distinct points are collinear, meaning they lie on the same line, then the determinant equation becomes undefined as the determinant of a 3x3 or smaller matrix with linearly dependent rows or columns is equal to zero. This means that there is no plane that passes through three collinear points as a plane requires at least three non-collinear points to be defined.
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If A + B + C = π, express cos (A + B) in terms of angle C.
Answer:
te te te te te te te rog vreau să mă iai la un cont decent în privat de la școală dar trebuie să se poate mai bine tu nu mi-ai spus sa te sun se va întâmpla la un cont decent și a ride la un moment de la card memorie micro
Step-by-step explanation:
trebuie sa faci așa 4629+(703)-105
Answer:
cos(A + B) = - cosC
Step-by-step explanation:
using the addition identity
cos(x ± y) = cosxcosy ∓ sinxsiny
given
A + B + C = π ( subtract C from both sides )
A+ B = π - C
then
cos(A + B)
= cos(π - C)
= cosπ cosC + sinπ sinC
= - 1 × cosC + 0 × sinC
= - cosC + 0
= - cosC
The population of rabbits on an island is growing exponentially. In the year 2004, the population of rabbits was 490, and by 2008 the population had grown to 560. Predict the population of rabbits in the year 2014, to the nearest whole number.
Answer: 630 rabbits
Step-by-step explanation: it shows that the population of rabbits grows by 70 each 4 years so we will have to add 70 to 560 which is 630 rabbits.
The population of rabbits in the year 2014 will be growing exponentially.
So, we can write a function
P = A · [tex]\alpha ^{x}[/tex]
where,
A is the original rabbits
[tex]\alpha[/tex] is the ratio of the increase
[tex]x[/tex] is the time (the unit is year)
In 2004, the population of the rabbits was 490
∴ P = 490 · [tex]\alpha ^{x}[/tex]
In 2008, the population increases to 560
∴ 560 = 490 · [tex]\alpha ^{2008-2004}[/tex]
560 = 490 · [tex]\alpha ^{4}[/tex]
[tex]\alpha ^{4\\[/tex] = [tex]\frac{560}{490}[/tex] = [tex]\frac{8}{7}[/tex]
[tex]\alpha[/tex] = [tex]\sqrt{\frac{2\sqrt{14} }{7} }[/tex]
In 2014, x = 2014- 2004 = 10
P = 490 · [tex]\sqrt{\frac{2\sqrt{14}}{7} } ^{10}[/tex]
≅ 684
Hence, the population of rabbits in the year 2014 will be approximately 684.
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Help pls just need to simplify
y-3x=5
y=3x +5
Determine the number of solutions of the system. Explain the reasoning.
The number of solutions of the system y = 3x + 5 is one because it is a linear equation.
What is linear equations?An equation in which is the highest power of to the variables 1 is knowns as the linear equation. Mathematically: it is an algebraic equations that can be also written in the form of ax + b = 0 or ax + by + c = 0, where a, b and c are definitely real numbers and x and y are variables with the highest power one.
Linear equations are equations in which the variables are raised to the power of 1, and the graph of the equation is a straight line. As a result, there is only one solution to the equation, which is when the line intersects the x-axis. This means that the equation has only one set of x- and y-coordinates, where x is the independent variable and y is the dependent variable, that satisfy the equation. The x-coordinate of the solution is the same as the value of x that makes the equation true and the y-coordinate is the value of y for this same x-value.
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What is the value of 110% of of of 64?
Answer:
The answer would be 70.4
Which line of best fit tends to underestimate the bite force and would NOT make
good predictions on the relationship of body mass and bite force of crocodiles?
Sol's Line
Taylor's Line
Patti's Line
Marrisa's Line
Taylor's Line Best Fit does not accurately anticipate the relationship between crocodile body mass and bite force and has a tendency to overestimate the bite force.
An infinite sum of terms that are expressed in terms of the function's derivatives at a single point is the Taylor series, also known as the Taylor expansion, of a function. Near this point, the function and the sum of its Taylor series are equivalent for the majority of common functions.
What is the line's Taylor form?P1(x) = (a)+ f'(x a) The function close to x = an is best approximated linearly by the tangent line. The curve and tangent line have the same first derivative, or slope, at the point where x = a. This close estimate is a Taylor polynomial of degree 1 is referred to as P1 (x).
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The fifth, ninth, sixteenth terms of a linear sequence (a.p.) are consecutive terms of an expodencial sequence (g.p.)
1. Find the common difference of the linear sequence in term of the first term.
2. Show that twenty-first , thirty-seventh and sixty-fifth terms of the linear sequence are consecutive terms of an exponential sequence whose common ratio is 7/4
The common difference is 7/4 and the required terms are 16a,28a,49a
What is a geometric progression?Any progression in which the ratio of adjacent terms is fixed is a Geometric Progression. The general form of representation of a geometric sequence is a, ar, ar2, ar3, ar4,...
Given here: The fifth, ninth, sixteenth terms of a linear sequence (a.p.) are consecutive terms of an expodencial sequence (g.p.)
5th term of the ap: a+4d
9th term: a+8d
16th term: a+15d
In a gp, the square of any term is equal to the product of the terms before and after it:
(a+8d)²=(a+4d).(a+15d)
[tex](a^2+16ad+64d^2)=a^2+19ad+60d^2\\4d^2-3ad=0\\d(4d-3a)=0[/tex]
(i) ANSWER: d = (3/4)a
(ii) 21st term: a+20d = a+15a = 16a
37th term: a+36d = a+27a = 28a
65th term: a+64d = a+48a = 49a
28a/16a = 7/4; 49a/28a = 7/4; this sequence is geometric with common ratio 7/4
Hence, The common difference is 7/4 and the required terms are 16a,28a,49a
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Question Down below (PLS HELP FOR 50 BRAINLIST)
Pls anyone i would appreciate it
Just select Two answers in the picture showen below
The two inequalities that represent the constraints in this situation are
r + c >= 80 and 1.45r + 0.65c <= 200
How to determine the inequalityLet r be the number of roses and c be the number of carnations Victor buys.
So, we have
Total number of flowers: r + c >= 80
Victor has $200 to spend on flowers for the school celebration.
Roses cost $1.45 each and carnations cost $0.65 each.
So, we have
Total spending: 1.45r + 0.65c <= 200
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The radius of a semicircle is 2 feet. What is the semicircle's area?
The area of the semicircle is 3.14 square feet.
The formula for area of a semicircle is A = ([tex]\pi[/tex]* r^2) / 2
Here A = Area
r = Radius
Given:
Given that the radius of the semicircle is 2 feet.
We need to Find out the area of the semicircle.
The value of [tex]\pi[/tex] is 3.14
A = ([tex]\pi[/tex] * 2^2) / 2
Substituting π = 3.14 and r = 2, we get;
A = (3.14 * 4) / 2
A = 6.28 / 2
A = 3.14 square feet
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a sample of five households is selected, and the size of each household is recorded. the median size is 3 and the mode is 2. what is the mean?
The relation between mode, mean and median is:
mode=3median-2mean
Now, to find mean:
2mean=3median-mode
mean=7/2 = 3.5
Let we wish to evaluate the mean μ of a population. In real practice we would typically take just one sample. Imagine still that we take sample after sample, all of the same size n, and compute the sample mean x¯ every time.
The sample mean x is a random variable: it differs from sample to sample in a way that cannot be predicted with sureness. We will write X¯ when the sample mean is idea of as a random variable and write x for the values that it takes.
The random variable X¯ has a mean, denoted μX¯, and a standard deviation, denoted σX¯. Here is an example with such a small population and small sample size that we can indeed write down every single sample.
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When Mirka is 5 years old, her parents start to give her pocket money of 50p per week. On her birthday each year, her parents increase her pocket money by 50p
How much pocket money does Mirka get in the first year?
If Mirka is 5 years old, her parents start to give her pocket money of 50p per week , then the amount of pocket money does Mirka get in the first year is £26 .
the amount that Mirka gets per week is = 50p ;
Age of Mirka is = 5 years ;
When Mirka is 5 years old, she starts to receive 50p per week in pocket money. On her birthday, her parents increase her pocket money by 50p.
that means ;
So, for the first year, the pocket money will be 50p per week for 52 weeks (1 year),
Pocket money in the first year = 50p × 52 weeks = £26 .
Therefore , Mirka will get £26 in the first year of her birthday .
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Spray drift is a constant concern for pesticide on Spray Droplet Size and Deposition t investigated the effects of herbicide formulation on spray atomization. A figure in a paper suggested the nomal distribution with mean 1050 m and standard deviation 150 μa reasonable model for droplet size for water (the "control and agricultural producers. The The paper "Effects of 2,4-D and was ) sprayed through a 760 ml/min nozzle.
(a) What is the probability that the size of a single droplet is less than 1470 μm? At least 950 μm? (Round your answers to four decimal places.)
less than 1470 μm __
at least 950 μm __
(b) What is the probability that the size of a single droplet is betweet 950 and 1470 μm? (Round your answer to four decimal places)
(c) How would you characterize the smallest 2% of all droplets? (Round your answer to two decimal places.) The smallest 2% of droplets are those smaller than ___ μm in size.
(d) If the sizes of five independently selected droplets are measured, what is the probabity that at least one exceeds 1470 μm? (Round your answer to four decimal places,) You may need to use the appropriate table in the Appendix of Tables to answer this question
(a) P(X < 1470) = 0.8849, P(X >= 950) = 0.7487, (b) the probability that the size of a single droplet is between 950 and 1470 μm is 0.6336, (c) the smallest 2% of all droplets are those smaller than 827 μm in size, and (d) the probability that at least one exceeds 1470 μm is 0.3995.
(a) To find the probability that the size of a single droplet is less than 1470 μm or at least 950 μm, we need to use the standard normal distribution table. To do this, we first need to convert the droplet size to a standard normal variable.
Let X be the droplet size. Then we have:
Z = (X - 1050)/150
The probability that the size of a single droplet is less than 1470 μm is equal to the cumulative distribution function of Z evaluated at Z = (1470 - 1050)/150 = 1.2:
P(X < 1470) = P(Z < 1.2) = 0.8849 (rounded to four decimal places)
The probability that the size of a single droplet is at least 950 μm is equal to 1 minus the cumulative distribution function of Z evaluated at Z = (950 - 1050)/150 = -0.6:
P(X >= 950) = 1 - P(Z < -0.6) = 0.7487 (rounded to four decimal places)
(b) To find the probability that the size of a single droplet is between 950 and 1470 μm, we subtract the cumulative distribution function of Z evaluated at Z = (950 - 1050)/150 = -0.6 from the cumulative distribution function of Z evaluated at Z = (1470 - 1050)/150 = 1.2:
P(950 <= X <= 1470) = P(Z <= 1.2) - P(Z <= -0.6) = 0.8849 - 0.2513 = 0.6336 (rounded to four decimal places)
(c) To find the smallest 2% of all droplets, we find the value of Z such that P(Z <= Z) = 0.02. Using the standard normal distribution table, we find that Z = -2.33. Then, we convert Z back to the original variable X:
X = Z * 150 + 1050 = -2.33 * 150 + 1050 = 827 (rounded to two decimal places)
So, the smallest 2% of all droplets are those smaller than 827 μm in size.
(d) To find the probability that at least one of five independently selected droplets exceeds 1470 μm, we use the cumulative distribution function of a binomial distribution with n = 5 and p = P(X > 1470). The cumulative distribution function of a binomial distribution with parameters n and p is given by:
1 - (1 - p)^n
Using the standard normal distribution table, we find that P(X > 1470) = 1 - P(Z < (1470 - 1050)/150) = 1 - 0.8849 = 0.1151. Then, we plug in n = 5 and p = 0.1151 into the cumulative distribution function formula:
P(at least one exceeds 1470 μm) = 1 - (1 - 0.1151)^5 = 0.3995 (rounded to four decimal places).
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Describe the translation thank you
The translation needed to obtain the graph of g(x) = 9^{x - 2} from the graph of f(x) = 9^x is shift 2 units right.
What is a horizontal translation?In Mathematics, a horizontal translation to the right is modeled by this mathematical expression g(x) = f(x + N) while a vertical translation to the negative y-direction (downward) is modeled by this mathematical expression g(x) = f(x) + N.
Where:
N represents an integer.g(x) and f(x) represent a function.By translating the exponential function f(x) = 9^x two (2) units to the right, we have the following:
f(x) = 9^x → g(x) = f(x - (2))
g(x) = 9^{x - 2}.
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The number line below is divided into equal parts.
Fill in the missing fractions and percentages.
Note that your fractions don't need to be in simplest form.
The remaining fractions and percentages can be represented
as
0 1/4 2/4 3/4 1
|--------------|--------------|--------------|--------------|
0% 25% 50% 75% 100%
What is a number line?Real numbers are represented by a straight line known as a number line. The distance between the dots on the line, which correlates to the magnitude of the numbers, is how the numbers are typically represented. Positive or negative numerals can be used, and they are normally marked at regular intervals.
Given that,
The number line is divided into equal parts,
The missing parts are
0 1/4 2/4 3/4 1
|--------------|--------------|--------------|--------------|
0% 25% 50% 75% 100%
This is how we can fill in the remaining fractions and percentages.
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what is the resultant image of point A(-12,3) , after a scale factor 1/3 and a rotation of 270 degrees?
The resultant image of point A(-12,3) , after a scale factor 1/3 and a rotation of 270 degrees is (1, 4).
What is dilation?In Geometry, dilation simply refers to a type of transformation which typically changes the size of a geometric object with respect to a specific scale factor, but not its shape.
Next, we would have to dilate the coordinates of the pre-image by using a scale factor of 1/3 centered at the origin as follows:
Ordered pair A (-12, 3) → Ordered pair A' (-12 × 1/3, 3 × 1/3) = Ordered pair A' (-4, 1).
By applying a rotation of 270° about the origin to the given figure, the location of A" is given by:
(x, y) → (y, -x)
Ordered pair A' (-12, 3) → Ordered pair A'' = (1, -(-4) = (1, 4).
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researchers are studying two populations of wild horses living in the western regions of a country. in a random sample of 32 horses taken from the first population, the mean age of the sample was 21 years. in a random sample of 41 horses from the second population, the mean age of the sample was 19 years. is the sampling distribution of the difference in sample mean ages approximately normal?
Yes, the sampling distribution of the difference in sample mean ages is approximately normal.
This is because the Central Limit Theorem states that the sampling distribution of the mean of any sample of size n will be approximately normal, provided that the samples are drawn from a population with a finite variance. Furthermore, the sample sizes in this case (32 and 41) are both greater than 30, which is the minimum sample size needed for the CLT to be valid.
The Central Limit Theorem is a fundamental theorem of statistics that states that the sampling distribution of the means of any sample of size n drawn from a population with a finite variance will be approximately normal, regardless of the shape of the population’s probability distribution.
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The pictures below are my questions please let me know if there’s a problem!! :)
Answer:
Step-by-step explanation:
(1) Yes, the table is proportional
4.5/25 = 5.4/30 = 6.3/35 = 7.2/40
= 0.18
For a $50 bill the donation will be
50 X 0.18 = $9
Hence, 0.18 times of the dinner bill is donated to charity
(2) Yes, this is also proportional
a1 = 0.47
a2 = 0.68
a3 = 0.89
a4 = 1.10
d = a2 -a1 = a3 -a2 = a4 - a3
= 0.21
For a 6 ounce letter the A.P will be a6 so
a6 = a + 5d
= 0.47 + 5(0.21)
= 0.47 + 1.05
= 1.52
Hence , For every ounce of weight the cost gets increased by 0.21 the weight
PLEASE HELP ASAP!! 15 points!!
Answer:
m<4 = 100
Step-by-step explanation:
Because 1 is opposite to 4 they equal the same degree
Circumference: C = πrd or C = 2mr
Area: A= r² or A = π(r) (r)
REMEMBER: Each square box of the grid measures 1 unit (un) long and 1 unit (un) high!
What is the circumference of Circle G?
Use 3.14 for pl. Show your work here:
What is the area of Circle G? Use 3.14 for pl.
Show your work here:
Answer: 31.4
Step-by-step explanation: the circumference is 31.4 because the radius is 5, you multiply by 2 to get a diameter that is 10, then multiply that by 3.14 because in this question pi=3.14.
Alexander was able to cover 25% of 150 km journey in the morning. What percent of journey is still left to be covered?
Answer:
the answer would be 75% of the journey
