The value of p is 3, the value of q is 5, and the value of r is 70804.
How to calculate the valueLet a be the first term of the arithmetic series, and d be the common difference.
From the given information, we have:
a = 22
an = 141 - 5 = 136
d = 3
We can use the formula for the nth term of an arithmetic series to find n:
an = a + (n-1)d
136 = 22 + 3(n-1)
114 = 3n - 3
n = 39
Now we can use the formulas for the sum of an arithmetic series to find p, q, and r:
Sn = n/2(2a + (n-1)d)
= 39/2(2(22) + (39-1)3)
= 39/2(44 + 114)
= 39/2(158)
= 3081
So the sum of the first 39 terms of the series is 3081.
We can write this as p(qt - 1), where t is the nth term of the series:
p(qt - 1) = p(a + (n-1)d)(a + (n-1)dq) - p
= p(22 + 3(39-1))(22 + 3(39-1)q) - p
= p(119)(119q) - p
= p(14161q - 1)
We know that this expression equals 3081, so:
p(14161q - 1) = 3081
Dividing both sides by 3081, we get:
p = 3081/(14161q - 1)
Since p, q, and r are integers, we need to find a factorization of 3081 that includes 14161q - 1 as a factor.
We can start by finding the prime factorization of 3081:
3081 = 3 * 1027
= 3 * 7 * 147
= 3 * 7 * 3 * 49
= 3^2 * 7^2 * 7
Now we can try different values of q and see if 14161q - 1 is a factor of 3081.
If q = 1, then 14161q - 1 = 14160, which is not a factor of 3081.
If q = 2, then 14161q - 1 = 28321, which is not a factor of 3081.
If q = 3, then 14161q - 1 = 42482, which is not a factor of 3081.
If q = 4, then 14161q - 1 = 56643, which is not a factor of 3081.
If q = 5, then 14161q - 1 = 70804, which is a factor of 3081.
Therefore, we have:
p = 3081/(14161(5) - 1)
= 3
q = 5
r = 14161q - 1
= 70804
So the value of p is 3, the value of q is 5, and the value of r is 70804.
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Match each function with the correct translation of the parent function f(x) = x.
160=1x1-4
f(x) = (x+4)
fx)=p+4
0
00
vertical translation down 4 units
horizontal translation right 4 units
horizontal translation left 4 units
vertical translation up 4 units
It is possible to translate the parent function f(x) = x using various transformations including vertical and horizontal translations. Each transformation will result in
the graph intersecting the x- or y-axis at a different point.
Function is an operation that takes an input, performs some processing on it, and returns a result. It is a set of instructions that performs a specific task. Functions are typically used to perform repetitive tasks, like finding the sum of two numbers, adding two strings together, or finding the maximum of a list of numbers. Functions are essential to programming and can be used to make code more organized, reusable, and efficient.
The function f(x) = x is the parent function for linear equations. This equation is generally used to graph a line with a slope of 1 and a y-intercept of (0, 0). In order to translate this parent function, different transformations are applied to it.
A vertical translation down 4 units would be represented by the equation f(x) = x - 4. This transformation would shift the graph of the parent function down 4 units on the y-axis. This would result in the graph intersecting the y-axis at the point (0, -4).
A horizontal translation right 4 units would be represented by the equation f(x) = x + 4. This transformation would shift the graph of the parent function right 4 units on the x-axis. This would result in the graph intersecting the x-axis at the point (4, 0).
A horizontal translation left 4 units would be represented by the equation f(x) = x - 4. This transformation would shift the graph of the parent function left 4 units on the x-axis. This would result in the graph intersecting the x-axis at the point (-4, 0).
Finally, a vertical translation up 4 units would be represented by the equation f(x) = x + 4. This transformation would shift the graph of the parent function up 4 units on the y-axis. This would result in the graph intersecting the y-axis at the point (0, 4).
In conclusion, it is possible to translate the parent function f(x) = x using various transformations including vertical and horizontal translations. Each transformation will result in the graph intersecting the x- or y-axis at a different point.
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gwen has saved $3500 and wants to deposit it into a savings that earns 4% annual interest for 10 years.
Gwen gets the interest amount in two different ways, which depend on his choice. If he deposits in simple interest, the interest amount is 1400, and if in compound interest 1680.9.
What are simple and compound interests?Simple interest:
The cost of borrowing is represented by simple interest (SI). It represents the interest in the principal only expressed as a percentage of the principal. Because they only have to pay interest on loans they take out, borrowers will gain from simple interest. By multiplying the interest amount by the tenure and the principal amount, one may quickly calculate simple interest. Simple interest does not take prior interest into account. It is based just on the initial contribution sum.
S.I = (Principal * Rate of interest * Time)/100
Compound interest:
Compound interest (CI), as opposed to simple interest (SI), which just earns interest on the principal, also earns interest on earlier interest payments. The principal amount is increased by the interest. Interest on Interest is referred to as CI. Compound interest, which is based on the primary power of compounding, causes investments to increase in value exponentially.
C.I = (Principal(1 + (rate/100))^(time)) - Principal
Given:
Principal = 3500
Rate = 4%
Time = 10 years
Simple Interest = (Principal * Rate of interest * Time)/100
= (3500 * 4 * 10)/100
= 1400
Compound Interest = [tex](Principal(1 + (rate/100))^{(time)}) - Principal[/tex]
= (3500(1 + 0.04)¹⁰) -3500
= 5180.9 -3500 ⇒ 1680.9
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Another company is advertising 59$ for their service plan I have the same plan but my bills is how much our plan is 15% more but it also includes additional services
In a case whereby Another company is advertising 59$ for their service plan ,The customer bill using Percentages can be expressed as $67.85.
How can the bill be calculated?In math, a percentage is a number or ratio expressed as a fraction of 100. It is denoted by the symbol %. Percentages are commonly used in many areas of math and science, such as statistics, finance, and physics. They are a useful way to express proportions, ratios, and rates in a standardized and easily understandable format.
The equation can be set up as ;
59 * (1+ 15%)
59 * (1.15)
=67.85
Therefore, the customer bill is $67.85
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Choose the appropriate descripition for the equation.Given:3x2+3y2=-27
Answer:
6 + 6y = -27
Step-by-step explanation:
3×2+3y2=-27
6 + 6y = -27
Hope it helps.
Answer:
6 + 6y = -27
Step-by-step explanation:
3×2+3y2=-27
6 + 6y = -27
Hope it helps.
8.6 ÷ 3 = in nearest hundred
The answer to the quotient expression 8.6 ÷ 3 in nearest hundred is 2.87,
Evaluating the quotient expressionFrom the question, we have the following parameters that can be used in our computation:
8.6 ÷ 3
To divide 8.6 by 3, we can use long division:
2.866
3 | 8.6 0 0
6
-----
2 0
1 8
-----
2 6
2 1
-----
5
The quotient is 2.866..., which we can round to the nearest hundredth as 2.87.
Therefore, the answer to 8.6 ÷ 3 in nearest hundred is 2.87,
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Kiran left his house at time zero and drove to the store, which is 3 blocks away, at a speed of 1 block per minute. Then he stopped and went into the store for 2 minutes. From there, he drove in the same direction at a speed of 1 block per minute until he got to the bank, which is 3 blocks away from the store. He stopped at the bank for 4 minutes. Then he drove home at a speed of 2 blocks every minute. Make a graph of showing the humber of blocks away from home that Kiran is a minutes after he leaves his house, until he gets back home.
we can see that Kiran is farthest from home (6 blocks away) at time 5, when he reaches the bank. He spends the most time away from home (9 minutes) during his entire journey.
How to make graph?
To make a graph showing Kiran's distance from home over time, we can use the following steps:
Divide the journey into three parts: from home to store, from store to bank, and from bank to home.
Calculate the time taken for each part of the journey based on the distance and speed.
Use a coordinate system to plot Kiran's distance from home on the y-axis and time on the x-axis.
Plot the points corresponding to Kiran's position at different times for each part of the journey.
Connect the dots to form a continuous line.
Let's go through each part of the journey in more detail:
Home to store: Kiran is driving at a speed of 1 block per minute, and the distance is 3 blocks. Therefore, he reaches the store in 3 minutes.
Store to bank: After spending 2 minutes at the store, Kiran continues driving at a speed of 1 block per minute, and the distance is 3 blocks. Therefore, he reaches the bank in 5 minutes.
Bank to home: After spending 4 minutes at the bank, Kiran drives at a speed of 2 blocks per minute, and the distance is 6 blocks. Therefore, he reaches home in 9 minutes.
To plot the graph, we can use a coordinate system where the x-axis represents time in minutes and the y-axis represents Kiran's distance from home in blocks. We can label the points on the graph corresponding to Kiran's position at different times, as follows:
At time zero, Kiran is at home, which is 0 blocks away from home.
At time three, Kiran reaches the store, which is 3 blocks away from home.
At time five, Kiran reaches the bank, which is 6 blocks away from home (3 blocks from the store plus 3 blocks from home).
At time nine, Kiran reaches home again, which is 0 blocks away from home.
To create the graph, we can plot these points and connect them with a line, as shown in the attached image.
Graph showing Kiran's distance from home over time
From the graph, we can see that Kiran is farthest from home (6 blocks away) at time 5, when he reaches the bank. He spends the most time away from home (9 minutes) during his entire journey.
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Umberto has $1, $10, $20, and $50 notes in his wallet. He has one of each type. He randomly removes two notes together. Find the probability that these two notes total
A.$11
b. $70
c. $80
d. at least $11.
NOT CHOOSE ANSWER!!!!
To solve this problem, we need to count the total number of ways that Umberto can remove two notes from his wallet, and then count the number of ways that he can remove two notes that add up to each of the given amounts.
There are a total of 4 possible notes that Umberto can choose from, so there are 4 choose 2 = 6 ways that he can remove two notes from his wallet.
To find the number of ways that he can remove two notes that add up to $11, we can observe that there is only one possible pair of notes: the $1 note and the $10 note. Therefore, the probability of getting a pair of notes that add up to $11 is 1/6.
To find the number of ways that he can remove two notes that add up to $70, we can observe that there is only one possible pair of notes: the $20 note and the $50 note. Therefore, the probability of getting a pair of notes that add up to $70 is 1/6.
To find the number of ways that he can remove two notes that add up to $80, we can observe that there is only one possible pair of notes: the $20 note and the $60 note (which is not in his wallet). Therefore, the probability of getting a pair of notes that add up to $80 is 0/6, which means it is impossible.
To find the number of ways that he can remove two notes that add up to at least $11, we can count the number of pairs of notes that add up to $11 or more. There are three such pairs: $1 and $10, $1 and $20, and $10 and $20. Therefore, the probability of getting a pair of notes that add up to at least $11 is 3/6, which simplifies to 1/2.
So, the probabilities for each part are:
A. $11: 1/6
B. $70: 1/6
C. $80: 0/6 (impossible)
D. at least $11: 1/2
Please help
Need to solve for angle A
A°= 117 + ?
———-
2
The measure of angle a is equal to 125°.
What is the theorem of intersecting chord?In Mathematics and Geometry, the theorem of intersecting chord states that when two (2) chords intersect inside a circle, the measure of the angle formed by these chords is equal to one-half (½) of the sum of the two (2) arcs it intercepts.
By applying the theorem of intersecting chord to this circle shown in the image attached above, we can infer and logically deduce that angle a can be calculated by using this formula:
m∠a = ½(b + c)
m∠a = ½(117 + 133)
m∠a = ½(250)
m∠a = 125°.
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The length of the base edge of a square pyramid is 6 ft, and the height of the pyramid is 16 ft. What is the volume of the pyramid?
96 ft3
192 ft3
288 ft3
576 ft3
Answer:
192 ft³
Step-by-step explanation:
Formula for the volume of a square pyramid is V=s²h/3, where s=base edge length and h=height. Remember: Order of Operations!!
V=6²(16)/3
=36(16)/3
=12(16)
=192
Below is a monthly budget for Entertainment. If the total budget is $80, how much is AMC A-List?
The cost of the AMC A-List is $20.
What is a Budget?A budget is a financial plan that outlines expected income and expenses over a specific period, usually a month, quarter, or year. It helps individuals, businesses, and governments to manage their finances effectively by providing a roadmap for spending and saving.
To solve this question, we can simply subtract the costs of the other two categories from the total budget:
Total budget - (Streaming services cost + Miscellaneous cost) = AMC A-List cost
$80 - ($40 + $20) = $80 - $60 = $20
Thus, the cost of the AMC A-List is $20.
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If the total monthly entertainment budget is $80, and it is distributed among three categories (AMC A-List, streaming services, and miscellaneous), what is the cost of AMC A-List if the streaming services cost $40 and miscellaneous expenses are $20?
Pls help
Which of these rational number's is the product of the other 6:
2/99, 2/3, 5/7, 2 1/3, 2 1/4, 10/11, 18.
Answer:
10/11
Step-by-step explanation:
60 families from each school in the district were given a survey asking them their primary method of transportation. 65% of the families surveyed said they would need bus transportation. 15% of families surveyed said they would walk to school. 18% of families surveyed said they would use their own transportation (parent drop off). 2% of those surveyed did not respond. What is the sample and what is the population in this scenario?
a) The sample in this scenario is 60 families from each school in the district.
b) The population is the total number of families in the school district.
What is the sample?The sample refers to the representative subset of the population surveyed or studied to learn more about the whole population.
The sample of families surveyed = 60 families from each school in the district
The population = the number of families in the school district
The percentage of families surveyed who need bus transportation = 65%
The percentage of families surveyed who would walk to school = 15%
The percentage of families surveyed who would use own transportation = 18%
The percentage of non-respondents = 2%
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Because the values of circular functions repeat every 2x, they are used to describe things that repeat periodically.
For example, the maximum afternoon temperature in a given city might be modeled by the formula below. In
the formula, t represents the maximum afternoon temperature in month x, with x = 0 representing January, x = 1
representing February, and so on.
t=85-25 cos
ХЛ
6
Trigonometric functions such as cosine and sine are periodic functions with a repeating pattern. The cycle of the feature is 12, which means that the temperature pattern repeats every 12 months or years.
What do you mean by trigonometric identities?Trigonometric identities are equalities that involve trigonometric functions and are valid for all the values of the variables given in the equation. There are several different trigonometric identities for the side length and angle of a triangle.
Yes you are right! Trigonometric functions such as cosine and sine are periodic functions with a repeating pattern. Because they repeat every 2π, they are often used to model and describe things that repeat periodically, such as temperature changes, sound waves, and the motion of objects. The formula you provided uses a cosine function to model temperature changes over a 12 month period. The maximum afternoon temperature is given by the formula t = 85 - 25cos(πx/6), where x is the number of months. The amplitude of the cosine function is 25, which represents the maximum temperature variation from the mean of 85 degrees Fahrenheit. The cycle of the feature is 12, which means that the temperature pattern repeats every 12 months or years.
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Use the given information to complete the proof of the following theorem
Answer:
yes
Step-by-step explanation:
Answer:
Yes
Step-by-step explanation:
Determine if √25 is rational or irrational and give a reason for your answer.
Question
A cylinder has a height of 12 inches. A similar cylinder has a height of 15 inches.
What is the ratio of the surface area of the larger cylinder to the surface area of the smaller cylinder?
Enter your answer by filling in the boxes.
The ratio of the surface area of the larger cylinder to the surface area of the smaller cylinder is 25:8.
How to find the ratio ?The surface area of a cylinder is given by the formula:
SA = 2πr^2 + 2πrh
Assume the radius of the smaller cylinder is r, and the radius of the larger cylinder is R. Since the two cylinders are similar, we know that the ratios of corresponding lengths are equal:
R/15 = r/12
Solving for r, we get:
r = 12R/15 = 4R/5
Now we can calculate the surface area of each cylinder:
SA small = 2πr^2 + 2πrh = 2π(4R/5)^2 + 2π(4R/5)(12) = 96πR^2/25
SA large = 2πR^2 + 2πRh = 2πR^2 + 2πR(15) = 30πR^2
The ratio of the surface area of the larger cylinder to the surface area of the smaller cylinder is:
SA large/SA small = (30πR^2)/(96πR^2/25) = 25/8
Therefore, the ratio of the surface area of the larger cylinder to the surface area of the smaller cylinder is 25:8.
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Answer:
NO ITS 25:16!!!!
Step-by-step explanation:
How can I find a unknown length in a right triangle easy step-by-step
29/24 rounded to the nearest hundred
Answer:
The answer to your problem is, 1.20
Step-by-step explanation:
First we need to convert our fraction to decimal which is:
1.2 EXACT.
We already know that it is in the tenths place shown: 1.2
We know that but how do you round it to the hundredths place?
Short answer: Cannot really since it is in the tenths place we can technically round it to, 1.20. Same fraction by the way.
Thus the answer to your problem is, 1.20
URGENT!
Kayla is graphing the function f(x)=√x−4+2.
Which points are on the graph of the function f(x)?
Select each correct answer.
A (6, 4)
B (3, 1)
C (12, 10)
D (-4,0)
E(0,2)
F(5,3)
G(3,3)
Three people put their names in a hat, then each draw a name, as part of a randomized gift
exchange. What is the probability that no one draws their own name? What about with four
people? Explain in detail how you arrived at your answer. (Hint: the answer is not 25% or
75%.)
The probability of no one drawing their own name is 9/24 = 3/8.
What is probability?
Probability is a measure of the likelihood or chance of an event occurring. It is expressed as a number between 0 and 1, where 0 indicates that an event is impossible and 1 indicates that an event is certain to occur.
The probability that no one draws their own name in a randomized gift exchange can be found using derangements. A derangement is a permutation of a set where none of the elements are in their original position.
With three people, there are 3! = 6 possible permutations. There is only one permutation where no one draws their own name, which is a derangement. Therefore, the probability of no one drawing their own name is 1/6.
With four people, there are 4! = 24 possible permutations. There are nine derangements, which can be calculated using the formula for derangements: [tex]D(n) = n!(1/0! - 1/1! + 1/2! - 1/3! + ... + (-1)^n/n!).[/tex]
Therefore, the probability of no one drawing their own name is 9/24 = 3/8.
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Time: 4 8 12 16 20 24
Fluid oz. 4 5.5 7 9 12 15
How would the graph be set up?
The answer of the given question based on the graph is , the graph would be scatter plot and the graph is attached below,
What is scatter plot?A scatter plot is a type of graph that displays the relationship between two numerical variables. The plot consists of a set of points, each representing an observation in the data set, with the x-coordinate corresponding to the value of one variable and the y-coordinate corresponding to the value of the other variable.
To graph this data, we can use a scatter plot. We would plot each data point as a coordinate, with the time values on the x-axis and the fluid oz. values on the y-axis.
Here's an example of how the graph could be set up:
Draw a horizontal x-axis labeled "Time" and a vertical y-axis labeled "Fluid oz." Make sure to include units (e.g. "Time (hrs)" and "Fluid oz. (oz)").
Label the tick marks on the x-axis with the time values provided: 4, 8, 12, 16, 20, and 24.
Label the tick marks on the y-axis with the fluid oz. values provided: 4, 5.5, 7, 9, 12, and 15.
Plot the data points as dots on the graph. For example, the first data point (4, 4) corresponds to a time of 4 hours and a fluid oz. value of 4 oz. Plot this point on the graph by finding the point on the x-axis labeled 4 and the point on the y-axis labeled 4, and then placing a dot at the intersection of those two points.
Repeat step 4 for all the data points, connecting them with straight lines to show the trend of the data.
The resulting graph will show how the fluid oz. value changes over time.
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Which ordered pair makes both inequalities true?
y < –x + 1
y > x
On a coordinate plane, 2 straight lines are shown. The first solid line has a negative slope and goes through (0, 1) and (1, 0). Everything below and to the left of the line is shaded. The second dashed line has a positive slope and goes through (negative 1, negative 1) and (1, 1). Everything above and to the left of the line is shaded.
(–3, 5)
(–2, 2)
(–1, –3)
(0, –1)
Answer: The region that satisfies both inequalities is the shaded area that is above the line y = x and below the line y = -x + 1. One point that lies in this region is (0, 0), which satisfies both inequalities because 0 is greater than negative x (which is also 0) and less than x + 1 (which is 1). So the ordered pair (0, 0) makes both inequalities true.
Step-by-step explanation:
What are the differences between an equation and in what cases would we use function notation for an equation?
Answer: A function is a set of ordered pairs where each input (x-value) relates to only one output (y-value). A function may or may not be an equation. Equations are functions if they meet the definition of a function. But, there are equations that are not functions.
Step-by-step explanation:
x-(-12) if x <-12 Help
Answer:
The answer is x + 12, where x is less than -12.
Step-by-step explanation:
If x is less than -12, then x-(-12) would be greater than -12-(-12), which simplifies to -12+12, which equals 0.
So, x-(-12) would be greater than 0, but we don't know the exact value of x, so we cannot simplify further. The expression would be x-(-12) or x+12, where x is less than -12.
A fossilized leaf contains 33% of its normal amount of carbon 14. How old is the fossil (to the nearest year)? Use
5600 years as the half-life of carbon 14.
Answer: The the fossil is approximately 8,267 years old.
Step-by-step explanation: To solve this problem, we can use the formula for exponential decay:
N(t) = N₀ * (1/2)^(t/T)
where:
N(t) = the amount of carbon-14 remaining after time t
N₀ = the initial amount of carbon-14
T = the half-life of carbon-14
Let's assume that the fossilized leaf originally contained 100% of its normal amount of carbon-14. Since it now contains only 33% of its normal amount, we can say that:
N(t) = 0.33N₀
Substituting this into the formula above, we get:
0.33N₀ = N₀ * (1/2)^(t/5600)
Dividing both sides by N₀ and taking the logarithm base 2 of both sides, we get:
t/5600 = log₂(0.33)
t = 5600 * log₂(0.33)
t ≈ -14187 years
This result is negative, which doesn't make sense in the context of the problem. It means that the fossil must be older than our initial assumption of 100% carbon-14. Let's assume instead that the fossil originally contained 50% of its normal amount of carbon-14 (which is more realistic). Then, we can say that:
N(t) = 0.5N₀
Substituting this into the formula above, we get:
0.5N₀ = N₀ * (1/2)^(t/5600)
Dividing both sides by N₀ and taking the logarithm base 2 of both sides, we get:
t/5600 = log₂(0.5)
t = 5600 * log₂(0.5)
t ≈ 8267 years
Therefore, the fossil is approximately 8267 years old.
Let U={1,2,3,…,18,19,20} be the universal set. Consider the sets: A={2,3,5,7,10,11,12,13,14,16,17,19} B={5,10,13,14,16,19,20} Find each of the following a. A U B b. A n B c. A n B
a. A U B = {1,2,3,5,7,10,11,12,13,14,16,17,19,20}
b. A n B = {5,10,13,14,16,19}
c. A' n B = {20}.
How to calculate union of a sets?a. A U B (the union of sets A and B):
To find the union of sets A and B, we combine all elements from both sets without duplication and put them together in a single set.
A = {2,3,5,7,10,11,12,13,14,16,17,19}
B = {5,10,13,14,16,19,20}
Combining the elements from both sets, we get:
A U B = {1,2,3,5,7,10,11,12,13,14,16,17,19,20}
b. A n B (the intersection of sets A and B):
To find the intersection of sets A and B, we look for the elements that are common to both sets. In other words, we find the elements that are present in both A and B.
A = {2,3,5,7,10,11,12,13,14,16,17,19}
B = {5,10,13,14,16,19,20}
Comparing the elements in both sets, we find that the common elements are: A n B = {5,10,13,14,16,19}
c. A' n B (the complement of A intersection B):
To find the complement of A intersection B, we first find A intersection B, as determined in the previous step to be {5,10,13,14,16,19}.
Then, we find the elements that are in the universal set U but not in A intersection B:
U = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20}
A intersection B = {5,10,13,14,16,19}
Comparing the elements in the universal set U and A intersection B, we find that the complement of A intersection B is:
A' n B = {20}
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The following data represent the pH of rain for a random sample of 12 rain dates in a particular region. A normal probability plot suggests the data could come from a population that is normally distributed. A boxplot indicates there are no outliers. The sample standard deviation is s = 0.309. Construct and interpret a 90% confidence interval for the standard deviation pH of rainwater in this region.
4.62
5.17
5.13
4.91
4.68
4.81
5.62
4.81
5.13
4.72
4.71
4.52
There is a 90% probability that the true population standard deviation is between
_____and_____.
Answer:
Step-by-step explanation:
To construct a confidence interval for the standard deviation of the pH of rainwater in this region, we will use the following formula:
Lower bound: sqrt((n-1)s^2 / X^2)
Upper bound: sqrt((n-1)s^2 / Y^2)
where n is the sample size, s is the sample standard deviation, and X and Y are the values of the chi-squared distribution that correspond to the lower and upper bounds of the confidence interval, respectively.
First, we need to calculate the sample size and the sample standard deviation:
n = 12
s = 0.309
Next, we need to find the values of X and Y from the chi-squared distribution. Since we want a 90% confidence interval, and there are (n-1) = 11 degrees of freedom, we can find the values of X and Y that correspond to the 5th and 95th percentiles, respectively, using a chi-squared table or a calculator:
X = 3.816
Y = 20.483
Now we can substitute these values into the formula to find the lower and upper bounds of the confidence interval:
Lower bound: sqrt((n-1)s^2 / X^2) = sqrt((11)(0.309^2) / (3.816)^2) = 0.152
Upper bound: sqrt((n-1)s^2 / Y^2) = sqrt((11)(0.309^2) / (20.483)^2) = 0.554
Therefore, we can say with 90% confidence that the standard deviation of the pH of rainwater in this region is between 0.152 and 0.554.
Interpretation: We are 90% confident that the true standard deviation of the pH of rainwater in this region falls between 0.152 and 0.554. This means that if we were to take many random samples of rainwater from this region and calculate the standard deviation for each sample, about 90% of the resulting confidence intervals would contain the true standard deviation of the population.
Tina is cutting out snickerdoodle cookies with a circular cutter. The cutter has a radius of 19
millimeters. What is the cutter's circumference?
Use 3.14 for л. If necessary, round your answer to the nearest hundredth.
millimeters
Answer: The circumference of the cutter is approximately 119.32 millimeters.
Step-by-step explanation: The formula for the circumference of a circle is C=2πr, where C is the circumference, π (pi) is a mathematical constant approximately equal to 3.14, and r is the radius of the circle.
In this problem, the radius of the circular cutter is given as 19 millimeters, so we can substitute that value into the formula:
C = 2πr
C = 2 × 3.14 × 19
C = 119.32
Rounding to the nearest hundredth, we get:
C ≈ 119.32 millimeters
Therefore, the circumference of the cutter is approximately 119.32 millimeters.
The formula to calculate the circumference of a circle is C=2πr, where r is the radius of the circle and π (pi) is a constant approximately equal to 3.14.
Given that the radius of the cutter is 19 millimeters, we can calculate its circumference as follows:
C = 2πr
C = 2 x 3.14 x 19
C = 119.32
Therefore, the cutter's circumference is approximately 119.32 millimeters
A company needs to buy laptops. For every 3 computers bought at regular price, the company can buy a fourth
computer at a 50% discount.
The regular price for one computer is $400.
How much with the company pay if they purchase 8 computers?
(Assuming there is not any tax) multiple choice
A)$3,200
B)$2,800
C)$3,000
D)$3,150
The diagram shows a shape made from a square circle, OAB, and a right angled triangle OBC. The radius of the circle is 5 centimetres and OC is 6 centimetres. Calculate the area of the shape
The area of the shape with the given features is 34.625 square cm
Calculating the area of the shapeFrom the question, we have the following parameters that can be used in our computation:
Composite figures
The area of the shape is the sum of the areas of individual shapes
So, we have
Area = triangle + quarter circle
This gives
Area = 1/2 * 6 * 5 + 1/4 * 3.14 * 5^2
Evaluate
Area = 34.625
Hence, the area is 34.625 square cm
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