Answer:
Step-by-step explanation:
To solve the differential equation x^2y'' − 3xy' + 3y = x^4e^x using variation of parameters, we can follow these steps:
Step 1: Find the complementary solution y_c by solving the homogeneous equation:
x^2y'' − 3xy' + 3y = 0
The characteristic equation is r(r-1) - 3r + 3 = 0, which simplifies to r^2 - 4r + 3 = 0. Factoring, we get (r-1)(r-3) = 0, so the roots are r=1 and r=3. Therefore, the complementary solution is:
y_c = c1x + c2x^3
where c1 and c2 are arbitrary constants.
Step 2: Find the particular solution y_p using variation of parameters. We assume that the particular solution has the form:
y_p = u1(x)*y1(x) + u2(x)*y2(x)
where y1 and y2 are solutions to the homogeneous equation (in this case, y1=x and y2=x^3) and u1 and u2 are functions to be determined.
We need to find the derivatives of y1 and y2:
y1' = 1, y1'' = 0
y2' = 3x^2, y2'' = 6x
Substituting into the differential equation and simplifying, we get:
x^2(u1''y1 + u2''y2) + x(u1'y1 + u2'y2) = x^4e^x
Plugging in y1 and y2 and simplifying, we get:
x^2(u1''*x + u2''*x^3) + x(u1'*1 + u2'*3x^2) = x^4e^x
We can write this equation in matrix form as:
[x^2x, x^2x^3] * [u1'', u2''] + [x1, x3x^2] * [u1', u2'] = [0, x^4e^x]
Taking the determinant of the coefficient matrix [x^2x, x^2x^3; x1, x3x^2], we get:
(x^2x)(x3x^2) - (x^2x^3)*x = 2x^4
Therefore, the inverse of the coefficient matrix is:
[3x, -x^3] / (2x^4)
Multiplying by the column vector [0, x^4e^x] gives:
[u1', u2'] = [3x, -x^3] * (1/(2x^4)) * [0, x^4e^x]
Simplifying, we get:
u1' = (3/2)*e^(-x), u2' = -(1/2)xe^(-x)
Integrating u1' and u2' with respect to x, we get:
u1 = -(3/2)*e^(-x), u2 = -(1/2)*xe^(-x) + C
where C is an arbitrary constant.
Therefore, the particular solution is:
y_p = -(3/2)xe^(-x) + Cx^3e^(-x)
where C is an arbitrary constant.
Step 3: The general solution of the differential equation is the sum of the complementary solution and the particular solution:
y = y_c + y_p
A random sample of 200 mothers and a
separate random sample of 200 fathers
were taken. The age of the mother when
she had her first child and the age of the
father when he had his first child were
recorded.
a. Describe the data for the mothers' age.
b. Describe the data for the fathers' age.
- Compare the distributions.
Mother
15
Father
우
40
35
30
25
20
15 20 25 30 35
45
40
Agesilosle
According to the information in the graph, the majority of women had children by the age of 20, while the majority of men had children by the age of 24.
What can be described about the women in this survey?The most important data of the age of women to have children according to the survey is that the majority of women had children at the age of 20 years. Additionally, that women began to have children from the age of fifteen to 40 years.
What can be described about the men in the survey?Based on the data in the graph, it can be inferred that most of the men had children by the age of 24. Additionally, these cover a range from 15 years to 41 years.
What differences are there in the distribution of the data?According to the survey data, we can establish that women had children at younger ages than men because women who had children are concentrated between the ages of 18 and 24, while men are more evenly distributed. between the ages of fifteen and 32.
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The area of AQRS is 14 square feet. What is the area, in square feet, of the image of AQRS after dilation with scale factor 2?
The area of the image is 56ft²
What is area scale factor?A scale factor in math is the ratio between corresponding measurements of an object and a representation of that object. If the scale factor is a whole number, the copy will be larger. If the scale factor is a fraction, the copy will be smaller.
The area scale factor is the square of the linear scale factor.
Therefore area scale factor = 2² = 4
Therefore the area of the image of the triangle = 14× 4
= 56ft²
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Find an equation of the straight line passing through the points (4, 3) and (2, -5).
The equation of the straight line is 4x -y = 13. It is general form of equation of a line.
What is a line?
A line has length but no width, making it a one-dimensional figure. A line is made up of several points that are endlessly extended in opposite directions. Two points in a two-dimensional plane determine it. Collinear points are described as two points that are on the same line.
The equation of a line that passes through the points (x₁, y₁) and (x₂, y₂) is
y - y₁ = [(y₂ - y₁)/(x₂ - x₁)](x - x₁).
The coordinates of the points are (4, 3) and (2, -5).
The slope of the line is (-5-3)/(2-4)
=-8/-2
= 4
The equation of line is
y - 3 = 4(x - 4)
→ y - 3 = 4x - 16
→ 4x -y = 13
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Use technology to find the probability that the standard normal deviation variable z is greater than 2.13, rounding to three decimal places.
P(z>2.13)=
Basically, do I use “normacdf” in a Ti-84 calculator? Is so, how do I solve this if not then what do i use?
The probability that the standard normal deviation variable z is greater than 2.13 is approximately 0.017.
What is standard normal deviation?
The standard normal deviation is a normal distribution with a mean of 0 and a standard deviation of 1. It is also referred to as the standard normal distribution or the z-distribution.
Standardizing a normally distributed variable involves transforming it into a standard normal variable by subtracting the mean of the original distribution from each value and dividing the result by the standard deviation. This transformation is known as standardization or normalization.
According to the question:
Yes, you can use the "normcdf" function on a TI-84 calculator to find the probability that the standard normal deviation variable z is greater than 2.13. Here's how:
Press the "2nd" button, then the "Vars" button to access the DISTR menu.
Scroll down to "2: normalcdf(" and press ENTER.
Enter the lower limit as -9999 (or any number much smaller than -2.13) since we want to find the probability to the right of 2.13.
Enter the upper limit as 2.13.
Enter the mean as 0 and the standard deviation as 1 since we are working with a standard normal distribution.
Press ENTER to get the probability.
The result should be approximately 0.01744. Rounding to three decimal places, we get:
P(z > 2.13) ≈ 0.017.
Therefore, the probability that the standard normal deviation variable z is greater than 2.13 is approximately 0.017.
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Here's a playground for a school of 360 children in Springfield.
1. The fence around the playground costs 90 dollars per 50-foot roll. Laying the grass across the area costs 400 dollars per 500 square feet. How much did the fencing and grass for this playground cost to build?
2. How many kids per square yard can Springfield's playground hold?
3. There's a new playground going up in nearby Wintermeadow. Wintermeadow has a budget about 3 times greater than Springfield's. Recommend a playground shape and size that would fit Wintermeadow's budget and hold at least 3 times as many kids as Springfield's playground at the same density of kids per square yard. How many kids can your playground hold?
1. The fencing and grass for this playground cost $16,360.
2. Springfield's playground can hold approximately 800 kids at a density of 25 square feet per child.
3. We can recommend a rectangular playground measuring approximately 166 yards by 40 yards, with a total area of 6,666.67 square yards. This playground should cost $49,200 for the fencing and grass.
How did we arrive at these values?1. To calculate the cost of the fencing and grass, we first need to know the dimensions of the playground. Let's assume that the playground is a rectangular shape measuring 100 feet by 200 feet, for a total area of 20,000 square feet.
To determine the cost of the fence, we need to know how many rolls of fencing are required. Each roll is 50 feet long, so we need four rolls to fence the perimeter of the playground (100 + 100 + 200 + 200 = 600 feet / 50 = 12 rolls, but we can't buy half a roll, so we round up to four rolls). Therefore, the cost of the fence is:
4 rolls x $90/roll = $360
To determine the cost of the grass, we need to know how many square feet of grass we need to cover the playground. Since each roll of grass covers 500 square feet, we need:
20,000 sq ft / 500 sq ft per roll = 40 rolls of grass
Therefore, the cost of the grass is:
40 rolls x $400/roll = $16,000
Adding the cost of the fence and the grass, we get the total cost:
$360 + $16,000 = $16,360
So the fencing and grass for this playground cost $16,360.
2. To calculate how many kids per square yard the playground can hold, we need to know the area of the playground in square yards. There are 9 square feet in a square yard, so the playground measures:
20,000 sq ft / 9 sq ft per sq yd = 2,222.22 sq yds
Assuming that each child requires 25 square feet of space to play, we can calculate how many kids can fit on the playground:
2,222.22 sq yds x (9 sq ft per sq yd / 25 sq ft per child) = 800 kids
Therefore, Springfield's playground can hold approximately 800 kids at a density of 25 square feet per child.
3. To recommend a playground shape and size that would fit Wintermeadow's budget and hold at least 3 times as many kids as Springfield's playground at the same density of kids per square yard, we first need to know Wintermeadow's budget.
Let's assume that Springfield's budget is $50,000, so Wintermeadow's budget is $150,000.
To determine the size of the new playground, we can start by calculating the cost of the fencing and grass for Springfield's playground per square yard:
$16,360 / 2,222.22 sq yds = $7.38 per sq yd
We can then use this cost to estimate the size of the new playground. Let's assume that the new playground will also be rectangular, and that we want it to hold at least 3 times as many kids as Springfield's playground, or 2,400 kids. Using the same density of 25 square feet per child, we need:
2,400 kids x 25 sq ft per child = 60,000 sq ft
Since there are 9 square feet in a square yard, this is:
60,000 sq ft / 9 sq ft per sq yd = 6,666.67 sq yds
Multiplying this area by the cost per square yard, we get the cost of the fencing and grass for the new playground:
6,666.67 sq yds x $7.38 per sq yd = $49,200
Therefore, we can recommend a rectangular playground measuring approximately 166 yards by 40 yards, with a total area of 6,666.67 square yards. This playground should cost $49,200 for the fencing and grass.
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What is the area of the base, B,
of the prism?
B = Ft
4 ft
6 ft
3 ft
A = 4 ft × 3ft = 12 ft²
∴ The area of the base of the prism is 12 ft².
Cai and his children went into a movie theater and will buy bags of popcorn and pretzels. He must buy a maximum of 7 bags of popcorn and pretzels altogether. Write an inequality that would represent the possible values for the number of bags of popcorn purchased, � b, and the number of pretzels purchased, � . p.
Answer: b + p ≤ 7
Step-by-step explanation:
Let's use b to represent the number of bags of popcorn purchased and p to represent the number of bags of pretzels purchased.
Since Cai can buy a maximum of 7 bags of popcorn and pretzels altogether, we know that:
b + p ≤ 7
This is the inequality that represents the possible values for the number of bags of popcorn purchased (b) and the number of bags of pretzels purchased (p).
In a round-robin chess tournament, each player is paired with every other player once. The function, shown below, models the number of chess games, N, that must be played in a round- robin tournament with chess players. In a round- robin chess tournament with 4 players, a total of 6 games were played Use this information to identify a point on the graph
In a round-robin chess tournament with 4 players, a total of 6 games were played.
What is function ?
In mathematics, a function is a relation between a set of inputs (also called the domain) and a set of possible outputs (also called the range) with the property that each input is related to exactly one output.
The formula for the number of chess games, N, in a round-robin tournament with n players is:
N = (n(n-1))/2
When n = 4, the number of games played is:
N = (4(4-1))/2 = 6
So, in a round-robin chess tournament with 4 players, a total of 6 games were played.
To identify a point on the graph, we need to plot the values of n and N on a graph with n as the x-axis and N as the y-axis. We can then plot the point (4,6) on the graph, where 4 represents the number of players and 6 represents the number of games played in the tournament. This point corresponds to the intersection of the horizontal line n=4 and the vertical line N=6. The graph is shown below:
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Solve:
|-6x|=30
no solution
x = 6 and x=10
x = -5 and x =5
x= -1 and x=-4
Answer:
x = -5 and x =5
Step-by-step explanation:
However, we notice that the solutions -5 and 5 satisfy the original equation in case 2, because |-6(-5)| = 30 and |-6(5)| = 30 is true. Therefore, the two solutions that satisfy the original equation in both cases are x = 5 and x = -5.
Hence, the solution to the equation |-6x| = 30 is x = 5 and x = -5.
A capsule manufacturing company is having difficulty filling capsules to the required 100 milligrams. Suppose a business researcher randomly selects 80 capsules, weighs each of them and computes its mean. By chance, the researcher selects capsules that have been filled adequately and that is how he gets the mean weight of 100 mg, which falls in the "fail to reject" region. The decision is to fail to reject the null hypothesis even though population mean is NOT actually 100 mg. Which kind of error has the researcher done in this case?
Using null hypothesis, we can find that the researcher has done type II error in this case.
What is null hypothesis?Hypothesis testing uses sample data from the population and draws conclusions about the population's probability distribution. It looks at a data assumption and uses a variety of methods for testing assumptions. The null hypothesis is rejected or not according to the results of the hypothesis test.
The chance of rejecting the null hypothesis when it is true is what is meant by type I error.
Probability of adopting the null hypothesis when it is untrue is the definition of type II error.
Here, CAPSULES is not actually 100 Mg and you have taken the decision of fail to reject the null hypothesis, (which means that accepting the null hypothesis) so, this is a type II error.
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a forest of 800 trees is exposed to a disease that kills 1/4 of the trees per year. how many trees will be left after after 11 years? round your answer to the nearest whole number
Answer:
34
Step-by-step explanation:
34 trees will be left after 11 years
The manager at Frydays sets a company goal to receive consistent, positive ratings by customers on social media over the next month.
The correct answer is (b) Ratings with a high mean and a low mean absolute deviation.
What is the mean absolute deviation?
Mean absolute deviation (MAD) is a statistical measure of how much the data values in a set deviate from the mean of the set.
Given options are
a. Ratings with a high mean and a high mean absolute deviation
b. Ratings with a high mean and a low mean absolute deviation
c. Ratings with a low mean and a high mean absolute deviation
d. Ratings with a low mean and a low mean absolute deviation
The manager at Frydays wants to receive consistent, positive ratings by customers on social media over the next month. Consistency means that the ratings are close to each other, and positive ratings mean that they are higher than average. Therefore, the goal is to have ratings with a high mean and a low mean absolute deviation.
The mean is a measure of central tendency that represents the average rating of customers, and a high mean indicates that the ratings are positive. The mean absolute deviation (MAD) is a measure of dispersion that represents how spread out the ratings are from the mean. A low MAD indicates that the ratings are close to each other and consistent.
Hence, The correct answer is (b) Ratings with a high mean and a low mean absolute deviation.
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If 3 men can load a lorry of goods in 2 h, how long will it take (a) 6 men. (b) 5 men, and (e) 2 men, to load the lory of goods if they work at the same rate?
Answer:
Below
Step-by-step explanation:
A) this one is easy....twice the manpower would take 1/2 the time = 1 hr
B) this requires a bit of calculation find man-hrs required per lorry
(3 men x 2 hr )/1 lorry = 6 man hours per lorry
then: 5 men * x hr = 6 man hours
x = 6/5 hr ( 1 hr 12 min)
C) similar to B 2 men * x hr = 6 man hrs
x = 6/2 hrs = 3 hrs
Answer:
see below
Step-by-step explanation:
more men = more hands = more help = less hrs cos faster
so your ans must be..
more men = less hrs
less men = more hrs
if...
3 men = 2hrs
1 man = 2hrs x 3 = 6hrs
so...
6 men = 6hrs ÷ 6 = 1 hr
5 men = 6hrs ÷ 5 = 6/5hr = 1 1/5hrs
2 men = 6hrs ÷ 2 = 3hrs
jack has 375in of sand to pour into a rectangular prism the base of the prism is 5 by 7 and the hight is 9 will the sand fit explain why or why not
Answer:
Yes, it will fit.
Step-by-step explanation:
To determine whether 375 cubic inches of sand will fit into the given rectangular prism, we need to calculate the volume of the prism and compare it to the amount of sand.
The formula for the volume of a rectangular prism is:
Volume = Base x Height x Width
In this case, the base of the prism is 5 by 7 inches, so the area of the base is:
Area of Base = 5 inches x 7 inches = 35 square inches
The height of the prism is 9 inches. Therefore, the volume of the prism is:
Volume = Base x Height = 35 square inches x 9 inches = 315 cubic inches
So, the volume of the prism is 315 cubic inches, which is less than the amount of sand Jack has (375 cubic inches). Therefore, all of the sand will fit inside the rectangular prism with room to spare.
In summary, the sand will fit inside the rectangular prism because the volume of the prism is greater than the amount of sand Jack has.
activity b Letter a only
A plot of the given complex numbers is shown in the Argand diagram attached below.
What is a complex number?In Mathematics, a complex number can be defined as any numerical quantity that comprises two main parts, which include a real number and an imaginary number.
In this exercise, you are required to plot the given complex numbers on an Argand diagram. Additionally, the sum and difference of the complex numbers z₁ and z₂ can be calculated as follows;
z₁ + z₂ = 5 + 2i + 1 + 3i
z₁ + z₂ = 6 + 5i
z₁ - z₂ = 5 + 2i - (1 + 3i)
z₁ - z₂ = 5 + 2i - 1 - 3i
z₁ - z₂ = 4 - i
In conclusion, we would use an online graphing calculator to plot all of the complex numbers as shown in the image attached below.
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Calc !
PLEASEE HELPP!
The size of a certain insect population is given by P(t) = 200e0.01t, where t is
measured in days. At what time will the population equal 1000?
Answer:
Your answer is about t = 621.5 days the population of insect will equal to 1000.
Step-by-step explanation:
Given:
[tex]P(t)=200e^{0.01t}[/tex] and population equal to 1000?
You are trying to find t in number of days when the insect population reaches equal to 1000 so.
[tex]1000=200e^{0.01t}\\\\\frac{1000}{200}=e^{0.01t} \\\\500=e^{0.01t}\\\\ln(500)=0.01t\\\\t=\frac{ln(500)}{0.01} \\\\t=621.4608098[/tex]
Answer
109.861 days
Step-by-step explanation:
a) initial population means when t=0, p(0)=500
b) dP/dt=5e^.01t
c)500e.01t =1000 (divide both sides of eq by 500)
e.01t =2 (take natural log of both sides)
ln( e.01t)=ln(2)
.01t= ln(2) (divide both sides of the eq by .01)
t= ln(2)/.01
t=69.315 days
d) 500e.01t=1500
(repeat steps in (c) above and you will get)
t=ln(3)/.01
t=109.861 days
need help please lol dont got much time. Simplify
Answer:
[tex]\frac{49}{45}[/tex] OR [tex]1\frac{4}{45}[/tex]
Step-by-step explanation:
Find the slope of the line that passes through the points (-2,3) and (7.-4).
Answer:
Slope is [tex]\frac{7}{-9}[/tex]
Step-by-step explanation:
For this problem we must use the slope formula:
[tex]\frac{change* in *y}{change*in*x}[/tex]
Our 2 y coords are: 3, -4
To find the change in y, we must subtract.
3 - ( -4 ) = 7
Our 2 x coords are: -2, 7
-2 - 7 = -9
Therfore, our answer is
[tex]\frac{7}{-9}[/tex]
Kara has 47 stickers.She buys 20 more stickers. How many stickers does she have now?Repeat for this problem.Tyrone has 30 stickers and buys 52 more stickers.How many stickers does he have now?
Answer:
Kara has 67 in total
Tyrone has 82 in total
and together they have 149
im not to sure what your asking but heres what i got...
The area of AQRS is 14 square feet. What is the area, in square feet, of the image of AQRS after dilation with scale factor 2?
The area of the image of AQRS after dilation with scale factor 2 is 56 square feet.
What is the area, in square feet, of the image of AQRS after dilation with scale factor 2?Given the data in the question;
Area of AQRS = 14 square feetArea of image AQRS after dilation with scale factor 2 ?If we dilate a figure with a scale factor of 2, the area of the dilated figure will be 2² = 4 times the area of the original figure.
So, to find the area of the image of AQRS after dilation with scale factor 2, we just need to multiply the area of AQRS by 4:
Area of dilated image = 4 × Area of AQRS
Area of dilated image = 4 × 14
Area of dilated image = 56 square feet
Therefore, the area of the image of AQRS is 56 square feet.
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If 10% of an amount is $51.20, then 100% of the amount is $
You create a masterpiece in your art studio and it is selected for an art exhibition. Your painting is 70 inches by 100 inches, and you choose framing that costs $4.95 per yard. Find the cost of framing.
The cost of framing for the masterpiece is $46.73.
How to calculate thisTo calculate the cost, we need to first determine the perimeter of the artwork.
Given the dimensions of the artwork, the perimeter is 100 + 100 + 70 + 70 = 340 inches.
The cost of framing is $4.95 per yard, so we need to convert the perimeter to yards.
To do this, we divide the perimeter by 36 inches since 1 yard equals 36 inches.
Thus, 340 inches divided by 36 inches equals 9.44 yards.
Therefore, the cost of framing the artwork will be 9.44 yards multiplied by $4.95 per yard, which equals $46.73.
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Is this a planar graph? If so, draw a planar representation of the graph. If not,
explain why it is not planar.
Each of these vertices, which together make up a full graph with five equation vertices, can be seen to be linked to the other four vertices in the subgraph.
What is equation?A mathematical equation is a process that links two statements and indicates equality using the equals sign (=). A formal statement that proves the equality of two calculations is known as an equation in algebra. For instance, the equal sign separates the numbers 3x + 5 and 14 in the equation 3x + 5 = 14. A mathematical formula may be used to understand the link between the two phrases that are inscribed on opposite sides of a letter. Frequently, the logo and indeed the particular software are identical. like in 2x - 4 = 2, for example.
This graph is not planar because it has a subgraph that is isomorphic to the whole, non-planar graph with five vertices (K5).
K5 is a non-planar graph as it cannot be represented in a planar manner on a 2D plane without at least five crossing edges. This graph is also non-planar since K5 is a subgraph of it.
We may determine five vertices that make up a whole subgraph, for instance, vertices 1, 2, 3, 5, and 6, to demonstrate that this graph has K5 as a subgraph. Each of these vertices, which together make up a full graph with five vertices, can be seen to be linked to the other four vertices in the subgraph.
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The following is data for the first and second Quiz scores for 8 students in a class.
First Quiz Second Quiz
14
16
29
42
43
44
47
48
11
17
31
35
37
37
38
43
Plot the points in the grid below, then sketch a line that best fits the data.
50+
45
40-
35
30
25
20
15
10-
5+
Clear All Draw:
5 10 15 20 25 30 35 40 45 SC
YAY
The equation of the line of best fit is ŷ = 0.8x + 3.3
How to determine the equation of the line of best fitFrom the question, we have the following parameters that can be used in our computation:
X- 14 16 29 42 43 44 47 48
Y- 11 17 31 35 37 37 38 43
When these values are entered in a graphing calculator, we have the following summary:
Sum of X = 283Sum of Y = 249Mean X = 35.375Mean Y = 31.125Sum of squares (SSX) = 1343.875Sum of products (SP) = 1055.625For the regression equation, we have
ŷ = bX + a
Where
b = SP/SSX = 1055.63/1343.88 = 0.78551
a = MY - bMX = 31.13 - (0.79*35.38) = 3.33764
So, we have
ŷ = 0.78551x + 3.33764
Approximate
ŷ = 0.8x + 3.3
Hence, the equation is ŷ = 0.8x + 3.3
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Using matrix method solve the following simultaneous equations 1x + 4y = 9 2x-3y=7
Thus, using the matrix technique, the solutions to the simultaneous equations are x = -1 and y = 1.
what is matrix ?A rectangular array of numbers or even other mathematical objects that can perform actions like addition and multiplication is known as a matrix. Matrices are widely used to describe systems of equations, transformations, and data in mathematics, physics, engineering, computer science, and many other disciplines. The individual matrix components are frequently identified by their row and column positions, and matrices have a predetermined number of rows and columns. There are numerous actions that can be carried out on matrices, including addition, subtraction, and multiplication by other matrices.
given
We can write the equations in matrix form as follows to answer the simultaneous equations 1x + 4y = 9 and 2x - 3y = 7 using the matrix method:
Then, on the left side of the equation, we can locate the inverse of the coefficient matrix:
| 1 4 |^-1 = 1/(-11) | -3 -4 |
|-2 -1 |
When we multiply both sides of the equation by the coefficient matrix's inverse, we obtain:
| x | | 1 4 |^-1 | 9 |
| x | | -3/11 -4/11 | | 9 |
| y | = | -2/11 -1/11 | x | 7 |
If we simplify, we get:
x = (-3/11)*9 + (-4/11)*7 = -1
y = (-2/11)
*9 + (-1/11)
*7 = 1
Thus, using the matrix technique, the solutions to the simultaneous equations are x = -1 and y = 1.
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The surface area of a right rectangular prism can be found by finding the sum of the area of each of the faces of the prism. What is the surface area of a right rectangular prism with length 4 centimeters (cm), width 9 cm, and height 3 cm? (Area of a rectangle is equal to length times width.)
The surface area of right rectangular prism is equal to 150 square centimeter
What is the surface area of a right rectangular prism?The surface area of a right rectangular prism can be found by finding the sum of the area of each of the faces of the prism.
A = 2(lw + hl + hw)
Where, "l" is the length and "h" is the height and "w" is the width
To determine the surface area of right rectangular prism.
Given the paramters as;
length = 4 cm
width = 9 cm
height = 3 cm
Substituting the given values, we get;
A = 2(lw + hl + hw)
A = 2 (36 + 27 + 12)
A = 150
Thus, surface area of right rectangular prism is 150 square centimeter
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2(4+62)-20divided by 4
Answer:
the answer is 28
4+62 = 66
66x2 = 132
132-20 = 112
112 divided by 4 = 28
hope this helps <3
Answer:
28
Step-by-step explanation:
i hope this helps
b) On average, about 240 people visit a local food pantry every day in search of groceries. On an extremely cold day, visitors to the food pantry can be 175% of the average amount. About how many visitors might go to the food pantry on an extremely cold day?
About 420 visitors might go to the food pantry on an extremely cold day
What is the percentage?
Percentage refers to a way of expressing a number as a fraction of 100. It is often denoted by the symbol "%". For example, if 30 out of 100 students in a class are girls, the percentage of girls in the class is 30%. Percentages are commonly used in many fields, such as finance, statistics, and science, to express proportions, rates, and changes over time.
The problem states that on average, about 240 people visit the food pantry every day in search of groceries. To find out how many visitors might go to the food pantry on an extremely cold day, we need to use the given percentage increase.
The phrase "175% of the average amount" means that we need to find 175% of 240, which is the same as multiplying 240 by 1.75 (since 175% is the same as 1.75 as a decimal). Using the multiplication, we get:
175% of 240 = (175/100) * 240 = 420
So, on an extremely cold day, the number of visitors to the food pantry might be around 420.
Therefore, about 420 visitors might go to the food pantry on an extremely cold day.
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GUYS A NEED HELP WITH THIS ASAP, I have to turn it in tomorrow, can y’all help me pls?? :,(
The values that make the inequality m + 4 > -6 true are -4, 0, and 5.
The values that make the inequality n - 3n ≤ 8 true are -4, 0, and 5.
The values that make the inequality -5 < 5f true are 0 and 5.
The values that make the inequality 7 ≤ -y + 7 true are -10, -4, 0, and 5.
An inequality for the statement "Hank's height (h) is less than or equal to 6 feet." is h ≤ 6.
An inequality for the statement "A magazine (m) cost more than $3.50" is m > $3.50.
An inequality for the statement "The temperature (t) is at least -5 degrees" is t ≥ -5.
How to determine the true values?In this exercise, we would evaluate the given inequalities as follows;
-4 + 4 > -6
0 > - 6 (True).
0 + 4 > -6
4 > - 6 (True).
5 + 4 > -6
9 > - 6 (True).
n - 3n ≤ 8
-4 - 3(-4) ≤ 8
8 ≤ 8 (True).
0 - 3(0) ≤ 8
0 ≤ 8 (True).
5 - 3(5) ≤ 8
-10 ≤ 8 (True).
Generally speaking, the phrase "at least" simply means or represents greater than or equal to and it can be denoted by this inequality symbol (≥).
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What percentage of votes did the last-place candidate receive?
The percentage of votes received by the last or fourth candidate in the example election is about 6.4%
What is a percentage?A percentage is a representation of a fraction of an b expressed using a denominator of 100.
A percentage is a representation of a part of whole as a fraction of 100
Therefore, the percentage of votes that a last place candidate in an election receives is the number of votes that the last candidate receives represented as a fraction of the total number of votes with the denominator of the fraction being 100.
An example of an election result is an election result in which the votes received by the four leading candidates can be presented as follows;
Party A = 8,794,726
Party B = 6,984,520
Party C = 6,101,533
Part D = 1,496,687
The percentage of votes received by the Party D is therefore;
% received by party D = ((1,496,687)/(8,794,726 + 6,984,520 + 6,101,533 + 1,496,687)) × 100 ≈ 6.4%The candidate of votes received by the fourth candidate, that received the least number of votes is 6.4%
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