The simplest form of the expression (x^(2)+8x+16)/(x^(2)-4x-32) is (x+4)/(x-8) with restrictions x≠8 and x≠-4.
The expression (x^(2)+8x+16)/(x^(2)-4x-32) can be simplified by factoring the numerator and denominator.
First, we can factor the numerator:
(x^(2)+8x+16) = (x+4)(x+4)
Next, we can factor the denominator:
(x^(2)-4x-32) = (x-8)(x+4)
Now, we can simplify the expression by canceling out the common factor of (x+4):
(x+4)(x+4)/(x-8)(x+4) = (x+4)/(x-8)
Therefore, the simplest form of the expression is (x+4)/(x-8).
However, there are restrictions on the variable x. The denominator of the expression cannot equal zero, so we must find the values of x that make the denominator zero and exclude them from the domain of the expression.
To find the restrictions, we set the denominator equal to zero and solve for x:
(x-8)(x+4) = 0
This gives us two solutions:
x = 8
x = -4
Therefore, the restrictions on the variable are x≠8 and x≠-4.
In conclusion, the simplest form of the expression (x^(2)+8x+16)/(x^(2)-4x-32) is (x+4)/(x-8) with restrictions x≠8 and x≠-4.
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15. The temperature, t, of water and the number
of minutes, m, the water is in the freezer
17. Name at least two independent variables that
could result in a change in the price of a basket
of grapefruits.
The dependent variable and independent variable in the 15th question is
t = dependent and m = independent variable.
What are variables?A variable is a quantity that may change within the context of a mathematical problem or experiment.
Given is a statement, The temperature, t, of water and the number of minutes, m, the water is in the freezer, we need to identity the dependent variable and independent variable for this statement,
Independent variable :-
It is a variable that doesn't change by the other variables.
Dependent variable :-
The dependent variable is the variable that is used for tested in an experiment.
Here, the temperature of the water is dependent on the number of minutes it has been kept in the freezer,
So, the temperature of the water is the dependent variable and the number of minutes it has been kept in the freezer is the independent variable.
Hence, the dependent variable and independent variable in the 15th question is t = dependent and m = independent variable.
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The question 17 is not completely mentioned
Page 7 of 10 Previous Save and complete later main of f(x)=(x+4)/(8x^(2)-9x+1) All real numbers except x
The main of the given function f(x) is all real numbers except x=-4.
To find the main, we need to find the roots of the function. That is, we need to find out the values of x for which the value of f(x) is equal to 0.
Solving for the roots, we get the following equation:
8x2-9x+1=0
Solving this equation using the quadratic formula yields:
x = (-9 ± √73)/16
Therefore, the roots of the equation are:
x = 0.41 and -4.41
Since the only root which belongs to all real numbers is x = -4, it is the main of the given function.
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Collins Middle School has 228 sixth grade students. If the sixth grade is 30% of the total school, how many students are in the middle school?
Answer:
760 students
Step-by-step explanation:
divide 228 ÷ 30%
30% = 0.30
228 ÷ 0.30 = 760
Question 1
A high school sports team is ordering sports drinks online from a company. The price of sports drinks varies, based on the number of drinks purchased. For orders of 50 or fewer sports drinks, the price is $0.80 per drink, plus $10 shipping and handling. When more than 50 sports drinks are ordered, the price is $0.70 per drink, plus $17 shipping and handling. What is the maximum amount of sports drinks you can purchase for $80?
A.87
B.90
C.100
D.114
The maximum number of sports drinks that can be purchased for $80 is 90 when they are priced at $0.70 per drink. (option B)
How to calculate for maximum amount of sports drinks that can be purchased for $80?Let's start by finding the number of sports drinks that can be purchased for $80 when they are priced at $0.80 per drink.
The price of each drink is $0.80, and the shipping and handling cost is $10.
Let x be the number of sports drinks that can be purchased for $80:
0.80x + 10 = 80
Subtracting 10 from both sides:
0.80x = 70
Dividing both sides by 0.80:
x = 87.5
Since we cannot purchase a fraction of a sports drink, we must round down to the nearest whole number, which is 87.
Now let's check if we can purchase more sports drinks for $80 when they are priced at $0.70 per drink.
The price of each drink is $0.70, and the shipping and handling cost is $17.
Let y be the number of sports drinks that can be purchased for $80:
0.70y + 17 = 80
Subtracting 17 from both sides:
0.70y = 63
Dividing both sides by 0.70:
y = 90
Since we cannot purchase a fraction of a sports drink, we must round down to the nearest whole number, which is 90.
Therefore, the maximum number of sports drinks that can be purchased for $80 is 90 when they are priced at $0.70 per drink.
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A snowboard has a price of $800. With sales tax, it will cost $848. What is the sales tax percentage?
As a result, there is a 6% sales tax.
What do the percentages mean?Percentages is a relative figure used to represent hundredths of a quantity. Because one percent (symbolised as 1%) represents one hundredth of something, 100 percent stands for everything, and 200 percent refers to twice the amount specified. percentage. Percentile is a related topic in mathematics.
The difference in sales tax is the price of the snowboarder with tax versus the price of the snowboarder without tax.
Sales tax therefore equals $848 - $800 = $48.
We need to multiply the result by 100 to get the sales percentage of tax, which we can then divide by the price of the snowboard before taxes.
Sales tax percentage = (Sales tax / Cost without tax) x 100
= ($48 / $800) x 100
= 0.06 x 100
= 6%
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A painting is purchased as an investment for $100. If its value increases continuously so that it doubles every 2 years, then its value is given by the function V(t) = 100 • 2^t/2 for t >= 0 where t is the number of years since the painting was purchased, and V(t) is its value (in dollars) at time t. Find v(4) and V(6). V(4) = $ _____
V(6) = $ _____
The value of the painting at t = 4 is $400 (V(4) = $400) and the value of the painting at t = 6 is $800 (V(6) = $800).
To find the value of the painting at t = 4 and t = 6, we can simply plug in these values into the function V(t) = 100 • 2^t/2, for t >= 0 where t is the number of years since the painting was purchased, and V(t) is its value (in dollars) at time t, and simplify.
For t = 4, we have:
V(4) = 100 • 2^4/2
V(4) = 100 • 2^2
V(4) = 100 • 4
V(4) = 400
For t = 6, we have:
V(6) = 100 • 2^6/2
V(6) = 100 • 2^3
V(6) = 100 • 8
V(6) = 800
Therefore, V(4) = $400 and V(6) = $800.
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Peggy had four times as many quarters as nickels. She had $2.10 in all. How many nickels and how many quarters did she have?
Which of the following equations could be used to solve the problem?
A.n + 4 n = 210
B.5 n + 100 n = 210
C.n + 4 n = 2.10
D.5 n + 100 n = 2.10
The algebraic equation that could be used to solve the problem is C. n + 4n = 2.10.
What is the algebraic equations?An algebraic equation is a mathematical statement that represents the equality of two expressions, using one or more variables, and mathematical operations such as addition, subtraction, multiplication, and division.
To solve this problem, we can use algebraic equations. Let's use the variable "n" to represent the number of nickels that Peggy has.
From the problem statement, we know that Peggy has four times as many quarters as nickels, which means she has 4n quarters.
We also know that she has a total of $2.10 in all. The value of her nickels is 0.05n dollars each, and the value of her quarters is 0.25(4n) = n dollars each. So we can set up the following equation:
0.05n + 0.25(4n) = 2.10
Simplifying this equation, we get:
0.05n + n = 0.525
1.05n = 2.10
n = 2
Therefore, Peggy has 2 nickels and 4(2) = 8 quarters.
Hence, the equation that could be used to solve the problem is C. n + 4n = 2.10.
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if anyone can help me with this and its the right answer i will give brainy please i really need this
Question 11
Which values in the data set are outliers? Show all work.
72, 81, 82, 83, 83, 85, 100, 54, 75, 81, 83
List the following (and show work if needed): Q1, Median, Q3, Lower Fence, Upper Fence, and Outliers
The dataset's median, which has a value of 82 and a total of 11 values, is the sixth figure.
what is median ?When a dataset is ordered from smallest to largest, the median, a measure of central tendency, shows the middle value of the dataset. It is frequently used as a more reliable substitute for the mean, which can be vulnerable to anomalies in the data with extremely high or low values. We must first sort the numbers in a dataset from smallest to largest before we can determine the median. The median is just the middle value when the dataset has an odd number of numbers. For instance, the median, or middle number, in the dataset "2, 5, 7, 10, 12" is 7.
given
Values that are noticeably higher or lower than the remainder of the dataset are found using the fences.
Step 1: Sort the information by size, starting from the smallest:
[tex]54, 72, 75, 81, 81, 82, 83, 83, 83, 85, 100[/tex]
Step 2: Calculate the middle
The dataset's median represents its middle number. The median is the sixth number in the dataset, which contains 11 values total:
Average: 82
Step 3: Determine the first and third quartiles (Q1 and Q3, respectively):
The medians for the dataset's lower and upper halves are Q1 for the lower part and Q3 for the upper. We don't use the median value to determine Q1 and Q3 because the dataset has an odd amount of values.
54, 72, 75, 81, 81 in the bottom half.
Top half: 83, 83, 83, 83, 85, and 100
Q1 = 75 for the bottom half's median.
Q3 = 83 for the top half's median.
The dataset's median, which has a value of 82 and a total of 11 values, is the sixth figure.
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PLS help me it’s due tomorrow
Part A: The height of the container is 5cm.
Part B: The cost of the coffee is $2.83.
Part C: The height of the container is 9cm.
Part D: The cost of the hot chocolate powder is $49.35.
What is volume of cylinder ?
The volume of a cylinder is the amount of space occupied by a cylindrical shape. It is given by the formula:
V = πr²h
where V is the volume, r is the radius of the circular base of the cylinder, and h is the height of the cylinder. The formula is derived by multiplying the area of the circular base (πr²) by the height (h) of the cylinder.
According to the question:
Part A:
Given that the container is a cylinder with a radius of 3cm, we can use the formula for the volume of a cylinder to find the height of the container. The formula for the volume of a cylinder is:
V = πr²h
where V is the volume of the cylinder, r is the radius of the cylinder, and h is the height of the cylinder.
Substituting the given values, we get:
45π = π(3)²h
Simplifying and solving for h, we get:
h = 5
Therefore, the height of the container is 5cm.
Part B:
The volume of the container is 45π cm³ and the cost of coffee is $0.02 per cubic centimeter. Therefore, the total cost of the coffee is:
Total cost = Volume x Cost per unit volume
Total cost = 45π x $0.02
Total cost = $0.90π
Rounding to two decimal places, we get:
Total cost = $2.83
Therefore, the cost of the coffee is $2.83.
Part C:
Given that the container is a cylinder with a radius of 5cm, we can use the same formula for the volume of a cylinder to find the height of the container. Substituting the given values, we get:
225π = π(5)²h
Simplifying and solving for h, we get:
h = 9
Therefore, the height of the container is 9cm.
Part D:
The volume of the container is 225π cm³ and the cost of hot chocolate powder is $0.07 per cubic centimeter. Therefore, the total cost of the hot chocolate powder is:
Total cost = Volume x Cost per unit volume
Total cost = 225π x $0.07
Total cost = $15.75π
Rounding to two decimal places, we get:
Total cost = $49.35
Therefore, the cost of the hot chocolate powder is $49.35.
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What are the first four terms of the sequence generated by g_(1)=(1)/(2) g_(n)=6g_(n-1), for all integers n>=2 ?
The first four terms of the sequence generated by g_(1)=(1)/(2) g_(n)=6g_(n-1), for all integers n>=2 are (1/2), 3, 18, and 108.
The first four terms of the sequence generated by g_(1)=(1)/(2) g_(n)=6g_(n-1), for all integers n>=2 are (1/2), 3, 18, and 108.
To find the first four terms of the sequence, we can use the given formula and plug in the values for n.
For the first term, n=1, so we use the formula g_(1)=(1)/(2) to get the first term, which is (1/2).
For the second term, n=2, so we use the formula g_(n)=6g_(n-1) and plug in the value for n and the value of the first term for g_(n-1):
g_(2)=6g_(2-1)=6g_(1)=6(1/2)=3
For the third term, n=3, so we use the same formula and plug in the value for n and the value of the second term for g_(n-1):
g_(3)=6g_(3-1)=6g_(2)=6(3)=18
For the fourth term, n=4, so we use the same formula and plug in the value for n and the value of the third term for g_(n-1):
g_(4)=6g_(4-1)=6g_(3)=6(18)=108
Therefore, the first four terms of the sequence are (1/2), 3, 18, and 108.
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Which of these rules are functions on an appropriate domain? Select all that apply.
$\vspace{.05in}$
$A$ inputs a real number, subtracts $100$, then outputs the square root of the result if it is real.
${}B$ inputs a date, then outputs the name of a person born on that date.
$C$ inputs a real number $x$, then outputs a real number $y$ that is less than $\frac{1}{1000}$ larger than $x$. $\smallskip$
$D$ inputs a real number $x$, then outputs the result of the calculation $\dfrac{x^2-1}{(x-1)(x+1)}$.
$E$ inputs a real number $x$, then a coin is flipped. If the coin flips heads, the output is $x+2$. If the coin flips tails, the output is $x+3$.
$F$ inputs a person, then outputs their birth date.
D and F are functions on an appropriate domain. A, C, and D are functions that take in a real number and output a real number, so they are valid functions on the domain of real numbers.
What is domain?A domain is a set of names or IP addresses that are associated with a particular website or web server. It is what allows users to access a website's content using a web browser. Domains are typically purchased from a domain registrar and can be used to host websites, email accounts, and other services.
B and F are invalid functions because they take in a real number and output something that is not a real number.
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Robert is making pink paint by mixing red and white paint in the ratio 1:3. Red paint costs £5 for 500ml. White paint costs £8 for 3 liters. Work out how much it will cost Robert to buy enough paint to make 12 liters of pink paint
Based on the ratio of red to white paint in making pink paint of 1:3, the total cost to Robert to buy enough paint to make 12 liters is $54.
What is the ratio?The Ratio refers to the relative size of one quantity compared to another.
Ratios are expressed in standard ratio form using (:) with one value in relation to another.
Ratios can also be depicted in percentages, fractions, and decimals.
The Ratio of mixing red and white paint = 1:3
The sum of ratios = 4 (1 + 3)
To mix 12 liters of pink paint, the quantity of red paint = 3 liters (12 x 1/4)
To mxi 12 liters of pink paint, the quantity of white paint required = 9 liters (12 x 3/4)
Cost of red paint per 500ml = £5
The cost of 1 liter of red paint = £10 (£5 x 2)
The total cost of 3 liters of red paint = £30 (£10 x 3)
Cost of white paint per 3 liters = £8
The total cost of 9 liters of white paint = £24 (£8 x 9/3)
The total cost of 12 liters of pink paint mixture = £54 (£30 + £24)
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Math part 3 question 6
To find (f ∘ g)(x), we need to substitute g(x) into f(x) wherever we see x in the expression for f(x).
So we have:
f(g(x)) = f(3x + 1) = (3x + 1)^2 - 8 = 9x^2 + 6x - 7
Therefore, the correct answer is: 9x^2 + 6x - 7.
Which compound inequality can be used to solve the inequality |3x+2>7|?
A.-7<3x+2>7
B.-7>3x+2>7
C.3x + 2 > -7 or 3x + 2 > 7
D.3x + 2 < -7 or 3x + 2 > 7
The correct answer is D. 3x + 2 < -7 or 3x + 2 > 7.
The correct compound inequality that can be used to solve the inequality |3x+2|>7 is D. 3x + 2 < -7 or 3x + 2 > 7.
When solving an absolute value inequality, we need to remember that the absolute value of a number is always positive. This means that if |3x+2|>7, then 3x+2 must be either greater than 7 or less than -7.
To write this as a compound inequality, we can use the word "or" to indicate that either one of these conditions must be true. This gives us the compound inequality 3x + 2 > -7 or 3x + 2 > 7.
However, we need to be careful with the first part of the compound inequality. Since we know that 3x+2 must be less than -7, we need to use the less than symbol (<) instead of the greater than symbol (>). This gives us the correct compound inequality, 3x + 2 < -7 or 3x + 2 > 7.
Therefore, the correct answer is D. 3x + 2 < -7 or 3x + 2 > 7.
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In 2010, bachelor's degrees conferred by colleges and universities in the United States were 1.2 million. In 2020, the number of bachelor's degrees awarded was 1.7 million.
Assume that the relationship between time and degree conferred is linear.
(a) Find an equation describing the number N bachelor's degrees awarded t years after 2010
(b) If the trend continues, estimate the number of bachelor's degrees to be awarded in 2023.
(c) Write a practical sentence expressing how the number of bachelor's degrees awarded changes yearly.
(d) Graph the number of bachelor's degree line over the time period stated in (a)
The equation that describe the number N bachelor's degrees awarded is N = 0.05t + 1.2 (a). The estimated number of bachelor's degrees to be awarded in 2023 is 1.85 million (b).
The practical sentence is "The number of bachelor's degrees awarded increases by 0.05 million, or 50,000, each year." (c). The graph, see the attachment.
The Explanation to Each Answer(a) To find the equation describing the number N of bachelor's degrees awarded t years after 2010, we can use the formula for a linear equation: N = mt + b, where m is the slope and b is the y-intercept.
We can find the slope by using the formula m = (y2 - y1) / (x2 - x1), where (x1, y1) and (x2, y2) are two points on the line. In this case, the two points are (2010, 1.2 million) and (2020, 1.7 million).
The y-intercept is the value of N when t = 0, which is the number of bachelor's degrees awarded in 2010, or 1.2 million. So the equation is:
N = 0.05t + 1.2(b) To estimate the number of bachelor's degrees to be awarded in 2023, we can plug in the value of t = 2023 - 2010 = 13 into the equation:
N = 0.05(13) + 1.2N = 0.65 + 1.2N = 1.85 millionSo the estimated number of bachelor's degrees to be awarded in 2023 is 1.85 million.
(c) A practical sentence expressing how the number of bachelor's degrees awarded changes yearly is: "The number of bachelor's degrees awarded increases by 0.05 million, or 50,000, each year."
(d) To graph the number of bachelor's degree line over the time period stated in (a), we can plot the two points (2010, 1.2) and (2020, 1.7) and draw a line through them.
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Help please ill give everything and good amount of points , please see the image( solve for the missing angle. Round to the nearest degree
Answer:
Step-by-step explanation:
where is the image don't see
Let X be a random variable having the gamma
distribution with shape parameter α and scale parameter γ, where α is
know and γ is unknown. let Y = σ log X. Show that
(i) if σ > 0 is unknown, then the distribution of Y is in a location-scale
family;
(ii) if σ > 0 is known, then the distribution of Y is in an exponential family.
Compulsory both subparts required .
i) If σ > 0 is unknown, then the distribution of Y is in a location-scale family with the parameters: Location parameter: α and Scale parameter: γ
ii) If σ > 0 is known, then the distribution of Y is in an exponential family with the parameters: Shape parameter: α and Scale parameter: σγ
(i) If σ > 0 is unknown, then the distribution of Y is in a location-scale family. This is because the distribution of Y can be expressed as a linear transformation of the distribution of X. Specifically, Y = σ log X = σ(log X - E[log X]) + E[log X], where E[log X] is the expected value of log X. This is the form of a location-scale family, with location parameter E[log X] and scale parameter σ.
(ii) If σ > 0 is known, then the distribution of Y is in an exponential family. This is because the distribution of Y can be expressed as an exponential family distribution with natural parameter -1/σ and sufficient statistic log X. Specifically, the probability density function of Y can be written as f_Y(y) = f_X(e^(y/σ)) * (1/σ) * e^(y/σ) = (1/σ) * e^(-(y-E[log X])/σ) * f_X(e^(E[log X]/σ)), where f_X is the probability density function of X. This is the form of an exponential family distribution, with natural parameter -1/σ and sufficient statistic log X.
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please help. Shape Y is an enlargement of shape X by a scale factor of 3. Work out lengths a and b. no
Answer:
a = 3, b = 9
Step-by-step explanation:
What is a scale factor?A scale factor is the number that you multiply each side of a shape to enlarge it. A scale factor of 3 means that each side of the new shape is three times the size of the original.
If the new shape is 3 times the size of the original, then we can take the side lengths (3 and 1) and multiply them by 3.
3 × 1 = 3 (side a)3 × 3 = 9 (side b)Therefore, the length of a is 3, whereas the length of b is 9.
URGENTT
Latasha is painting a mural for a school project. A model of the mural is shown below. In the model, side T is 7 inches and side S is 9.4 inches
Answer:Latasha should ask her mom for help
Step-by-step explanation:
Problem 5: Assume \( A, B, C, D \), and \( X \) are \( n \times n \) matrices, and assume invertibility of matrices whereever needed. Then solve the equation \( A X(B+C X)^{-1}=D \) for \( X \).
The solution for \( X \) is \( X = (A - D C)^{-1} D B \).
Assume \( A, B, C, D \), and \( X \) are \( n \times n \) matrices, and assume invertibility of matrices wherever needed. Then, the equation \( A X(B+C X)^{-1}=D \) can be solved for \( X \) by following these steps:
Step 1: Multiply both sides of the equation by \( (B+C X) \) to get rid of the inverse:
\( A X = D(B+C X) \)
Step 2: Distribute the \( D \) on the right side of the equation:
\( A X = D B + D C X \)
Step 3: Rearrange the equation to isolate \( X \) on one side:
\( A X - D C X = D B \)
Step 4: Factor out \( X \) on the left side of the equation:
\( (A - D C) X = D B \)
Step 5: Multiply both sides of the equation by the inverse of \( (A - D C) \) to solve for \( X \):
\( X = (A - D C)^{-1} D B \)
Therefore, the solution for \( X \) is \( X = (A - D C)^{-1} D B \).
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2 tigers for every bear. What is the ratio of tigers to bears?
Answer:
2:1
Step-by-step explanation:
So, let's say we have two tigers and one bear. If we want to talk about how many tigers we have compared to how many bears we have, we can say "the ratio of tigers to bears is 2 to 1."
What this means is that for every two tigers we have, we have one bear. So if we had four tigers, we would expect to have two bears, because we have two sets of two tigers each, and each set of two tigers corresponds (to be similar to something else) to one bear.
A ratio is just a way of comparing two things, like tigers and bears, by describing how much of one thing there is compared to the other thing. So when we say the ratio of tigers to bears is 2 to 1, we're saying that we have twice as many tigers as we do bears.
Kareem has 216 role playing game cards.His goal is to collect all 15 sets of cards.There are 72 cards in a set.How many more cards does Kareem need to reach his goal?
Answer:
864 cards
Step-by-step explanation:
Goal: 15 set of cards
*72 cards in a set*
15 x 72 = 1080
15 sets of cards = 1080 cards in total
However Kareem so far has 216 cards.
To find out how much more cards Kareem need to reach his goal, you do the following:
1080 - 216 = 864
Kareem needs 864 more cards to reach his goal.
hope this helped....
The scale factor of two similar cylinders is 5:2. The volume of the smaller cylinder is 28 m^3. What is the volume of the larger cylinder?
a. 70 m^3
b. 700 m^3
c. 437.5 m^3
d. 350 m^3
e. 175 m^3
Therefore, the volume of the larger cylinder is 44.8. [tex]m^{3}[/tex], which is closest to option (c) 437.5. [tex]m^{3}[/tex].
What is volume?Volume is a measure of the amount of space occupied by an object or substance. It is a three-dimensional quantity that is usually measured in cubic units, such as cubic meters (m³), cubic centimeters (cm³), cubic inches (in³), or gallons (gal).
Given by the question.
The ratio of the volumes of two similar solids is the cube of the ratio of their corresponding side lengths. In this case, the ratio of the scale factor of the cylinders is 5:2, so the ratio of their volumes is (5/2) ^3 = 125/8.
If the volume of the smaller cylinder is 28 m^3, then we can set up the following equation to solve for the volume of the larger cylinder:
(125/8) * V = 28
where V is the volume of the larger cylinder.
Simplifying this equation, we get:
V = 28 * (8/125) * 125
V = 224/5
V = 44.8 [tex]m^{3}[/tex]
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I am a cube number, a square number, an odd number ,my middle digit is prime and i have less than 6 digits
The number which is a cube number, an odd number, middle digit is prime and is of less than 6 digit is 1331.
The only number that satisfies all the given conditions is 1331.
The number 1331 is a cube number because it is 11 to the power of 3,
which is written as ⇒ (11 × 11 × 11 = 1331).
The number 1331 is also a square number because it is 11 to the power of 2, which means
⇒ (11 × 11 = 121), and 121 is a square number.
The number 1331 is not divisible by 2, so it is an odd number.
The middle digit of the number 1331 is 3, which is a prime number.
And also, the number 1331 has less than 6 digits.
Therefore, the required number is 1331.
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The given question is incomplete, the complete question is
I am a cube number, a square number, an odd number ,my middle digit is prime and i have less than 6 digits, Find that number.
omework: 2.1 tion list Solve the following equation and check. (x)/(7)+(x)/(9)=(9)/(14)
We have that, given the equation (x)/(7)+(x)/(9)=(9)/(14) we will get as an answer x = 567/224
To solve the equation (x)/(7)+(x)/(9)=(9)/(14), we need to find the common denominator of the fractions on the left-hand side of the equation. The common denominator of 7 and 9 is 63, so we can multiply each fraction by the appropriate factor to get the common denominator:
[tex](x)/(7) * (9)/(9) + (x)/(9) * (7)/(7) = (9)/(14)[/tex]
[tex](9x)/(63) + (7x)/(63) = (9)/(14)[/tex]
Now we can combine the numerators on the left-hand side of the equation:
[tex](16x)/(63) = (9)/(14)[/tex]
To isolate the variable x, we can cross-multiply and then divide by the coefficient of x:
[tex](16x)(14) = (9)(63)[/tex]
[tex]224x = 567[/tex]
[tex]x = 567/224[/tex]
To check our answer, we can plug it back into the original equation and simplify:
[tex](567/224)/(7) + (567/224)/(9) = (9)/(14)[/tex]
[tex](567/224) * (1/7) + (567/224) * (1/9) = (9)/(14)(567/1568) + (567/2016) = (9)/(14)(1275752 + 1140480)/(3167232) = (9)/(14)(2416232)/(3167232) = (9)/(14)(9)/(14) = (9)/(14)[/tex]
Since both sides of the equation are equal, our answer is correct.
Answer: [tex]x = 567/224[/tex]
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Which measure is equivalent to 8 kilometers?
1 km≈0.6 mi
1 mi = 5,280 ft
Responses
0.025 ft
4.8 ft
25,344 ft
704,000 ft
25344 ft
We can use the conversion factors to convert 8 kilometers to another measure.
From the given conversion factors, we know that:
1 km ≈ 0.6 mi
1 mi = 5,280 ft
So, to convert 8 kilometers to feet, we can first convert it to miles and then convert miles to feet:
8 km x 0.6 mi/km = 4.8 miles
4.8 miles x 5,280 ft/mile = 25,344 ft
Therefore, 8 kilometers is equivalent to 25,344 feet.
The answer is option (C) 25,344 ft
Determine the time taken when distance is 7150km and the speed is 780 km/hr
Answer:
denote the time by T , distance by S , and the speed by V. We have that S = 7150km, V = 780 km/hr , T= ?.. T = S:V = 7150 : 780 = 9.17
Answer is T = 9.17 hour
given an "Armfield pump rig" to find the characteristics and efficiency of a pump experimentally. In this context, the pump is an energy converter that converts electrical power into hydraulic power.
the sample points are logged with a constant setting of rotational speed (angular velocity). power data is registered along the way - electric power into the electric motor, pressure from the pump and volume flow during throttling of the water flow out of the pump.
given data from EXCELbelow:
use EXCEL to solve the questions below, and explain step by step procedure
a) Calculate effects and efficiencies for all operating points.
b) Create a graph showing the delivery pressure (Pa) ("Pump 1") as a function of volume flow (Flow Rate Q) in (m3 / s)
c) Create a graph showing motor power (Pump 1) (W) as a function of volume flow (Flow Rate) Q (l / s) on an axis and efficiency (Pump 1 (%) on a secondary axis
To calculate the effect of the pump, use the formula: P = Q * ΔP / η and To calculate the efficiency of the pump, use the formula: η = P / P_e. Use the data provided in the EXCEL file.
To solve the questions, follow these steps:
a) Calculate effects and efficiencies for all operating points:
1. To calculate the effect of the pump, use the formula: P = Q * ΔP / η, where P is the power of the pump, Q is the volume flow rate, ΔP is the pressure difference across the pump, and η is the efficiency of the pump.
2. To calculate the efficiency of the pump, use the formula: η = P / P_e, where P is the power of the pump, and P_e is the electrical power input to the pump.
3. Use the data provided in the EXCEL file to calculate the effects and efficiencies for all operating points.
b) Create a graph showing the delivery pressure (Pa) ("Pump 1") as a function of volume flow (Flow Rate Q) in (m3 / s):
1. Select the data for the delivery pressure (Pa) and volume flow (Flow Rate Q) in the EXCEL file.
2. Click on the "Insert" tab in EXCEL and select the "Scatter" chart option.
3. Choose the "Scatter with Straight Lines" option to create a graph showing the delivery pressure (Pa) as a function of volume flow (Flow Rate Q).
c) Create a graph showing motor power (Pump 1) (W) as a function of volume flow (Flow Rate) Q (l / s) on an axis and efficiency (Pump 1 (%) on a secondary axis:
1. Select the data for the motor power (Pump 1) (W) and volume flow (Flow Rate) Q (l / s) in the EXCEL file.
2. Click on the "Insert" tab in EXCEL and select the "Scatter" chart option.
3. Choose the "Scatter with Straight Lines" option to create a graph showing the motor power (Pump 1) (W) as a function of volume flow (Flow Rate) Q (l / s).
4. Add a secondary axis to the graph by clicking on the "Format" tab in EXCEL and selecting the "Secondary Axis" option.
5. Select the data for the efficiency (Pump 1 (%) and add it to the secondary axis of the graph.
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Malcom had some milk chocolates and dark chocolates. He ate an equal amount of milk and dark chocolates. He had 5/7 of the milk chocolates and 2/5 of the dark chocolates left. What fraction of the chocolates did Malcom eat?
Malcom ate 7/10 of the total chocolates.
What is amount?Amount is a term used to describe the quantity of something, usually a numerical value. It can refer to money, a number of people or objects, or a measurement such as weight or volume. Amounts can also be used to represent a value of something abstract, such as time, effort, or emotion. Amounts are typically quantified, meaning they can be easily compared to other amounts.
The fraction of chocolates that Malcom ate is 5/7 of the milk chocolates and 2/5 of the dark chocolates, so the total fraction of chocolates that Malcom ate is (5/7) + (2/5) = 7/10. Therefore, Malcom ate 7/10 of the total chocolates.
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A high school track team's long jump record is 22 ft 6 3/4 in. This year, Arthur's best long jump is 22 ft 5 1/2 in. If long jumps are measured to the nearest quarter inch, how much farther must Arthur jump to break the record?
Answer:
To compare Arthur's long jump to the record, we need to convert both measurements to the same unit. Let's convert both measurements to inches:
Record: 22 ft 6 3/4 in = (22 x 12) + 6 + 3/4 = 270 + 6 + 0.75 = 276.75 in
Arthur's jump: 22 ft 5 1/2 in = (22 x 12) + 5 + 1/2 = 270 + 5 + 0.5 = 275.5 in
To determine how much farther Arthur needs to jump to break the record, we subtract Arthur's jump distance from the record distance:
Record distance - Arthur's jump distance = 276.75 in - 275.5 in = 1.25 in
However, we are told that long jumps are measured to the nearest quarter inch. Therefore, we need to round the difference to the nearest quarter inch. Since 1.25 inches is closer to 1.25 than it is to 1.5, we round down to the nearest quarter inch. This gives us:
1.25 in ≈ 1.25/4 = 0.3125 quarters ≈ 0.25 quarters
Therefore, Arthur needs to jump an additional 0.25 quarters (or 1/16 of an inch) to break the record.