Answer:
55
Step-by-step explanation:
here are 24 people in a fitness studio. 3/8 of the people are lifting weights, 1/3 are cross training, and the remaining people are running. What fraction of the people are running?
Answer:
7/24 i think i hope this helps and im right
Yes, I need help, give answer as IMPROPER fraction.
Answer:
[tex]w = \frac{93}{40} [/tex]
Assume that a sample is used to estimate a population mean . Find the 99% confidence intervat for a Sample of size 68 with a mean of 65.9 and a standard deviation of 16.5. Enter your answer as an open- interval (low, high)
The 99% confidence interval for the population mean based on the given sample is (61.86, 69.94). This means that we are 99% confident that the true population mean falls within this interval.
To find the 99% confidence interval for a sample with a sample size of 68, a sample mean of 65.9, and a standard deviation of 16.5, we can use the formula for calculating the confidence interval for a population mean when the population standard deviation is known.
The formula is given by:
Confidence Interval = (sample mean) ± (critical value) * (standard deviation / sqrt(sample size))
First, we need to find the critical value corresponding to a 99% confidence level. Since the sample size is large (n = 68), we can use the Z-table or a Z-table calculator to find the critical value. For a 99% confidence level, the critical value is approximately 2.576.
Next, we can substitute the given values into the formula to calculate the confidence interval:
Confidence Interval = 65.9 ± 2.576 * (16.5 / sqrt(68))
Using a calculator or mathematical software, we can calculate the standard error of the mean:
Standard Error = standard deviation / sqrt(sample size) = 16.5 / sqrt(68) ≈ 1.997
Substituting the standard error into the formula, we have:
Confidence Interval = 65.9 ± 2.576 * 1.997
Calculating the values inside the interval, we get:
Confidence Interval = (65.9 - 2.576 * 1.997, 65.9 + 2.576 * 1.997)
Simplifying further, we have:
Confidence Interval = (61.86, 69.94)
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What value of Y makes the equation true? Y + 2.9 = 11
Answer:
8.1
Step-by-step explanation:
Subtract 2.9 to get Y alone.
11 - 2.9 = 8.1
Solve the system of equations x' 2x – 3y + 2 sin(2t) y' = x – 2y — 2 cos(2t)
Upon solving the given system of equations:
[tex]x(t) = (c_1 + e^{-t}) + (3/2) * (c_2 + e^{-t}) * cos(2t) + (1/2) * (c_1 + e^{-t}) * sin(2t),\\y(t) = (c_1 + e^{-t}) + (3/2) * (c_2 + e^{-t}) * sin(2t) - (1/4) * (c_1 + e^{-t}) * cos(2t)[/tex]
To solve the system of equations:
x' = 2x - 3y + 2sin(2t)
y' = x - 2y - 2cos(2t)
We can use the method of undetermined coefficients to find the particular solution. Assuming the particular solution takes the form:
[tex]x_p(t) = A sin(2t) + B cos(2t)\\y_p(t) = C sin(2t) + D cos(2t)[/tex]
Substituting these expressions into the original equations, we get:
2(A sin(2t) + B cos(2t)) - 3(C sin(2t) + D cos(2t)) + 2sin(2t) = 2sin(2t)
(A sin(2t) + B cos(2t)) - 2(C sin(2t) + D cos(2t)) - 2cos(2t) = cos(2t)
(2A - 3C + 2)sin(2t) + (2B - 3D)cos(2t) = 2sin(2t)
(A - 2C)sin(2t) + (B - 2D - 2)cos(2t) = cos(2t)
By comparing the coefficients of sine and cosine on both sides, we can equate them separately:
2A - 3C + 2 = 2
2B - 3D = 0
A - 2C = 0
B - 2D - 2 = 1
Solving these equations, we find:
A = 1
B = 3/2
C = 1/2
D = -1/4
So the particular solution is:
[tex]x_p(t)[/tex] = sin(2t) + (3/2)cos(2t)
[tex]y_p(t)[/tex] = (1/2)sin(2t) - (1/4)cos(2t)
To find the complementary solution, we solve the homogeneous system:
x' = 2x - 3y
y' = x - 2y
We can rewrite this system as a matrix equation:
X' = AX
where [tex]X = [x, y]^T[/tex] and
[tex]A = \left[\begin{array}{ccc}2&-3\\1&-2\end{array}\right][/tex]
The characteristic equation is:
det(A - λI) = 0, where I is the identity matrix. Solving this equation, we find the eigenvalues:
[tex]\lambda_1 = -1\\\lambda_2 = -1[/tex]
For each eigenvalue, we solve the corresponding eigenvector equation:
(A - λI)V = 0
For [tex]\lambda_1 = -1[/tex], we have:
[tex]\left[\begin{array}{ccc}3&-3\\1&-1\end{array}\right] * V_1 = 0[/tex]
Solving this system, we find the eigenvector:
[tex]V_1 = [1\ \ 1][/tex]
For [tex]\lambda_2 = -1[/tex], we have:
[tex]\left[\begin{array}{ccc}3&-3\\1&-1\end{array}\right] * V_2= 0[/tex]
Solving this system, we find the eigenvector:
[tex]V_2 = [3\ \ 1][/tex]
So the complementary solution is:
[tex]x_c(t) = c_1 * e^{-t} * [1\ \ 1]^T + c_2 * e^{-t} * [3\ \ 1]^T\\y_c(t) = c_1 * e^{-t} * [1\ \1]^T + c_2 * e^{-t} * [3\ \ 1]^T[/tex]
where
[tex]c_1\ and\ c_2[/tex] are arbitrary constants.
The general solution is the sum of the particular and complementary solutions:
[tex]x(t) = x_p(t) + x_c(t)\\y(t) = y_p(t) + y_c(t)[/tex]
Simplifying and combining terms, we get:
[tex]x(t) = (c_1 + e^{-t}) + (3/2) * (c_2 + e^{-t}) * cos(2t) + (1/2) * (c_1 + e^{-t}) * sin(2t)\\y(t) = (c_1 + e^{-t}) + (3/2) * (c_2 + e^{-t}) * sin(2t) - (1/4) * (c_1 + e^{-t}) * cos(2t)[/tex]
where [tex]c_1\ and\ c_2[/tex] are arbitrary constants.
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What is the measure of the angle supplementary to a 47.5 degree angle?
137.5
52.5
42.5
152.5
Answer:
132.5 degrees. Check to see if there is missing information in the question or any mistakes.
Step-by-step explanation:
Supplementary angles = 180 degrees
180 - 47.5 = 132.5
The time series component that exhibits a repeating pattern over successive periods, often one-year intervals is called
A. a cyclical component
B. a trend component.
C. seasonal component.
D. irregular component.
The time series component that exhibits a repeating pattern over successive periods, often one-year intervals, is called the seasonal component. It represents the regular and predictable variations in the data that occur due to seasonal factors, such as weather patterns, holidays, or annual events.
The seasonal component typically follows a consistent pattern, where the values tend to rise and fall in a similar manner within each season. For example, retail sales may experience higher values during the holiday season each year and lower values during other times.
Identifying and analyzing the seasonal component is crucial in many fields, including economics, finance, marketing, and forecasting. By understanding and accounting for the seasonal patterns, analysts and decision-makers can make more accurate predictions, adjust for seasonality in data, and develop strategies to optimize operations or sales during specific periods.
Methods such as seasonal decomposition or seasonal adjustment techniques are used to separate the seasonal component from other components, such as trend and irregular fluctuations, in order to better understand the underlying patterns and make informed decisions based on the data.
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Numerical methods for non-autonomous ODES [8 marks] Consider using the modified Euler formula Yn+1 = yn +hF(t, + $; Yn + F(tryn)), for some step size h > 0, to compute numerical solutions of the initial value problem dy F(t,y), y(to) = yo dt Use the modified Euler formula with step sizes h = 0.05 and h = 0.001 to compute approximate values of the solution to the following initial value problem dy 2t +ety, y(0) = 1, dt at the four time steps t = 0.1, 0.2, 0.3 and 0.4.
The approximate values of the solution to the given initial value problem at the four time steps t = 0.1, 0.2, 0.3 and 0.4 using the modified Euler formula with step sizes h = 0.05 and h = 0.001 are as follows:
Approximate solution using h = 0.05y(0.1) = 1.12116266y(0.2) = 1.25755476y(0.3) = 1.41728420y(0.4) = 1.59967883
Approximate solution using h = 0.001y(0.1) = 1.00372378y(0.2) = 1.00745820y(0.3) = 1.01119282y(0.4) = 1.01492766
The non-autonomous ordinary differential equation is given as:
dy/dt = f(t,y)......(1)
where f is a continuous function and is defined for all values of t and y. The numerical methods for non-autonomous ODEs are described below:
Modified Euler Formula (Improved Euler Method)This method is based on the same idea as Euler's method, but the derivative is evaluated at the midpoint of the interval instead of the initial point. Consider the initial value problem (IVP) dy/dt = f(t,y), y(to) = yo, and suppose that we want to approximate the solution at tn+1 = tn + h. Then, using the improved Euler's formula, we obtain the following approximation:
Yn+1 = yn + hF(tn + h/2, yn + hF(tn,yn)/2)......(2)
Using h = 0.05
Substituting h = 0.05 in equation (2), we get
Y1 = Y0 + 0.05(F(0.025,Y0+F(0,Y0)/2))
Y2 = Y1 + 0.05(F(0.075,Y1+F(0.05,Y1)/2))
Y3 = Y2 + 0.05(F(0.125,Y2+F(0.1,Y2)/2))
Y4 = Y3 + 0.05(F(0.175,Y3+F(0.15,Y3)/2))
Using h = 0.001
Substituting h = 0.001 in equation (2), we get
Y1 = Y0 + 0.001(F(0.0005,Y0+F(0,Y0)/2))
Y2 = Y1 + 0.001(F(0.0015,Y1+F(0.001,Y1)/2))
Y3 = Y2 + 0.001(F(0.0025,Y2+F(0.002,Y2)/2))
Y4 = Y3 + 0.001(F(0.0035,Y3+F(0.003,Y3)/2))
For the given IVP, f(t,y) = 2t + ety, y(0) = 1
So, substituting f(t,y) in equation (1), we get
dy/dt = 2t + ety.....(3)
Using the modified Euler formula (equation 2), we get
Using h = 0.05
Y1 = 1 + 0.05(2(0.025) + e(0.025)Y0) = 1.12116266
Y2 = 1.12116266 + 0.05(2(0.075) + e(0.075)Y1) = 1.25755476
Y3 = 1.25755476 + 0.05(2(0.125) + e(0.125)Y2) = 1.41728420
Y4 = 1.41728420 + 0.05(2(0.175) + e(0.175)Y3) = 1.59967883
Using h = 0.001
Y1 = 1 + 0.001(2(0.0005) + e(0.0005)Y0) = 1.00372378
Y2 = 1.00372378 + 0.001(2(0.0015) + e(0.0015)Y1) = 1.00745820
Y3 = 1.00745820 + 0.001(2(0.0025) + e(0.0025)Y2) = 1.01119282
Y4 = 1.01119282 + 0.001(2(0.0035) + e(0.0035)Y3) = 1.01492766
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You want to save $1,200 per quarter for 15 years towards the purchase of a trailer. You feel that you can earn 3.12% compounded quarterly for this period of time. If your first deposit is in 3 months, what is the most expensive trailer that you can purchase?
The most expensive trailer can be purchased for $39,505.41. To determine the most expensive trailer that can be purchased at an interest rate of 3.12% compounded quarterly, we calculate the future value of the savings.
The formula for compound interest is given by the equation:
A = [tex]P(1 + r/n)^(nt)[/tex]
Where:
A is the future value of the savings,
P is the quarterly deposit amount ($1,200),
r is the interest rate per compounding period (3.12%),
n is the number of compounding periods per year (quarterly, so n = 4),
and t is the number of years (15).
Plugging the values into the formula, we have:
A =[tex]1200(1 + 0.0312/4)^(4*15)[/tex]
Calculating this expression, we find the future value of the savings after 15 years to be approximately $39,505.41.
Therefore, the most expensive trailer that can be purchased is $39,505.41 or less, as that is the maximum amount that will be saved over the 15-year period.
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Buenos días personas!!!
Necesito ayuda con esta problema de Matemáticas. ¿Me ayudan por favor?
PROBLEMA: Calcula 5€ de descuento de 16,80€
SOLUCIÓN: no sé
Muchas gracias!!
Respuesta:
11,80 €
Explicación paso a paso:
Dado:
Importe o coste = 16,80 €
El valor de descuento sobre la cantidad = 5 €
El precio o costo con descuento sobre el monto entregado será; la diferencia entre la cantidad dada y el valor de descuento
Importe - valor de descuento
16,80 € - 5 €
= 11,80 €
Consider the function shown below.
g(x) = 2^x
If the function g is horizontally compressed by a factor of 1/2 and reflected across the x-axis to obtain function f, which of the following graphs matches the above transformation?
The graph of the transformation by of horizontally compressing g(x) by a factor of 1/2 and then reflecting across the x-axis is graph Y
How to determine the graph?The function is given as:
[tex]g(x) = 2^x[/tex]
When compressed horizontally by a factor of 1/2, the transformation rule is:
g'(x) = g(2x)
So, we have:
[tex]g(2x) = 2^{2x}[/tex]
[tex]g(2x) = 4^x[/tex]
When reflected across the x-axis, the transformation rule is:
[tex](x,y) \to (x,-y)[/tex]
So, we have:
[tex]f(x) = -4^x[/tex]
The graph represented by this is graph Y.
Hence, the graph of the transformation is graph Y
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(11m-7m)-(2m+6m) the sum or differce
Answer:
-4m
Step-by-step explanation:
=11m-7m-(2m+6m)
=11m-7m-8m
=-4m
plz mark me as brainliest
Answer:
-4m
Step-by-step explanation:
Hey!
==================================================================
First, We should remove the Parentheses.
To remove them, we distribute the negative over (2m + 6m).
⇒ 11m - 7m - (2m + 6m)
⇒ 11m - 7m - 2m - 6m
Work the Problem from Left to Right.
⇒ 4m - 2m - 6m
⇒ 2m - 6m
⇒ -4m
==================================================================
Hope I Helped, Feel free to ask any questions to clarify :)
Have a great day!
More Love, More Peace, Less Hate.
-Aadi x
WILL GIVE BRAINLIEST!!! If w = 6 units, x = 3 units, and y = 5 units, what is the surface area of the figure?
The surface area of the figure is 204 sq.unit.
What is Surface Area ?The surface area of a three dimensional figure is the sum of area of all its faces.
Here a three dimensional figure is given and surface area has to be calculated.
The base is a cuboid
Surface Area of a cuboid = SA= 2lw+2lh+2hw
SA = 2 * 6 * 6 +2 * 6 * 3 + 2 * 6 * 3
SA = 144 sq.units
The Surface Area of the 4 triangle surface = 4 * (1/2) * base * height
SA = 2 * 6 * 5 = 60 sq.units
The total surface area = 144 +60 = 204 sq.units
Therefore the surface area of the figure is 204 sq.unit.
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help me out and ill give brainliest
Answer:
C
Step-by-step explanation:
Y= MX (The Slope which is Rise/Run) minus 2 (The Y-Intercept).
a circle has a diameter of 18. the sector has a central angle of 30 degrees. what is the area of the sector?
Answer:
21.21
Step-by-step explanation:
Area of a circle is A = π r^2
Variables:
r = 18/2 = 9
θ = 30 deg
Find the area:
A = π r^2
A = π 9^2
A = 254.47
Find the area of the sector:
θ/360 * A
= 30/360 * 254.47
= 21.21
Please mark brainliest if this helped!
Please mark brainliest if this helped!
Help on this please asap
Answer:
87.75
Step-by-step explanation:
You are correct
The radius of a circle is 4 feet. What is the area?
r=4ft
Give the exact answer in simplest form.
_____ square feet
Which linear equation represents Catherine’s situation?
Answer:
y=1/9x+104
Step-by-step explanation:
I REALLY hope this helps
Sorry if im wrong
Best of luck!
a square has f the diagonals of a square bisects its angles?
Answer:
ok so i can have i insteaof f too
Step-by-step explanation:
How many gallons of water are used to fill 2 fish tanks
Answer:
It depends on the size of the fish tank, so this question cannot be properly answered.
Answer:It depends I can give a ratio
Step-by-step explanation:
If one tank needs 45 gallons of water and another needs 30 you will need 75 gallons of water. If your using pints or quarts you can find converter calculators
Yeah help guys today was way to stressful to do this shi right now
Answer:
15.3125
Step-by-step explanation:
i gotchu
Leo has 24 golf clubs. He has 3 golf bags. Each bag contains the same number of clubs. How many golf clubs are in each bag?
Answer:
8
Step-by-step explanation:
24/3 = 8
Best method to solve y=-3x+4 y = 3x-2
Solve for the first variable in one of the equations, then substitute the result into the other equation.
Point Form:
( 1 , 1 )
Equation Form:
x = 1 , y = 1
HELP PLS
Jane needs 6 1/2 of fabric to make a dress. She has one piece of fabric that is 1 1/2 yards and another piece of fabric that is 3 1/4 yards. How many more yards of fabric does Jane need to make the dress?
from the sum of 3a^2-ab-2b^2 and 2a^2+5ab-3b^2 subtract a^2-3ab-4b^2
4a^2+7ab-b^2
Step-by-step explanation:
Add the first two equations together:
3a^2-ab-2b^2
+ 2a^2+5ab-3b^2
---------------------------
5a^2+4ab-5b^2
Subtract that answer from the remaining trinomial:
5a^2+4ab-5b^2
- a^2-3ab-4b^2
--------------------------
4a^2+7ab-b^2
Answer:
4a^2 + ab - 9b^2
Step-by-step explanation:
First, perform the indicated addition:
3a^2-ab-2b^2
2a^2+5ab-3b^2
------------------------
5a^2 + 4ab - 5b^2
From this sum we subtract a^2 - 3ab - 4b^2:
5a^2 + 4ab - 5b^2
-(a^2 - 3ab - 4b^2
------------------------------
4a^2 + ab - 9b^2
Caitlyn uses 47-centstamps and 8.cent stamps to mail a gift card to a friend. If the postage is $2.99, how many of each stamp did Caitlyn use?
Let the number of 47-cent stamps be x, and the number of 8-cent stamps be y. So, the cost of x 47-cent stamps will be $0.47x.The cost of y 8-cent stamps will be $0.08y.Therefore, $2.99 = $0.47x + $0.08y Multiply the entire equation by 100 to eliminate decimals. $299 = 47x + 8yEquation 1.47x + 8y = 299There are a couple of ways to solve the system of equations.
One method is substitution. We can rearrange equation 1 to solve for x:47x = 299 - 8y x = (299 - 8y)/47Substitute this expression for x into the first equation: 0.47(299 - 8y)/47 + 0.08y = 2.99 Simplifying the equation, we get: 299 - 8y + 4.76y = 299y = 299/0.76y = 393.4Hence, we cannot have fractional values of y; it must be a whole number, so Caitlyn can use 32 47-cent stamps and 15 8-cent stamps to mail a gift card to a friend.
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What is front-end ratio and how do you figure it out?
Answer:
The front-end ratio is calculated by dividing an individual's anticipated monthly mortgage payment by his/her monthly gross income. The mortgage payment generally consists of principal, interest, taxes, and mortgage insurance (PITI). Lenders use the front-end ratio in conjunction with the back-end ratio to determine how much to lend.
Step-by-step explanation:
-6x + 12 , can somebody explain this ?
Step-by-step explanation:
Factor −6 out of −6x
-6(x)+12
Factor −6 out of 12.
−6(x)−6(−2)
Factor −6 out of −6 (x)−6(−2).
-6(x-2)
Excuse me, for the person who answers this right I will brain list. (if you can't quiet understand the question, I left an image)
Complete: For the function ()=−2‾‾‾‾‾√3, the average rate of change to the nearest hundredth over the interval −2 ≤ x ≤ 4 is ______.
Answer: It is 3.>9
Step-by-step explanation:
because i dont know
() = 0.50, () = 0.70, ( ∪ ) = 0.85 Are the events, and , independent in this situation? You must provide reasoning for your answer.
Answer:
Independent events
Step-by-step explanation:
Given
[tex]P(A) = 0.50[/tex]
[tex]P(B)= 0.70[/tex]
[tex]P(A\ u\ B) = 0.85[/tex]
Required
Determine the relationship between the events
To do this, we simply calculate P(A n B) using:
[tex]P(A\ n\ B) = P(A) * P(B)[/tex]
and
[tex]P(A\ n\ B) = P(A) + P(B) - P(A\ u\ B)[/tex]
So, we have:
[tex]P(A\ n\ B) = P(A) * P(B)[/tex]
[tex]P(A\ n\ B) = 0.50 * 0.70[/tex]
[tex]P(A\ n\ B) = 0.35[/tex]
and
[tex]P(A\ n\ B) = P(A) + P(B) - P(A\ u\ B)[/tex]
[tex]P(A\ n\ B) = 0.50 + 0.70 - 0.85[/tex]
[tex]P(A\ n\ B) = 0.35[/tex]
Since: [tex]P(A\ n\ B) = P(A) * P(B)[/tex] [tex]= 0.35[/tex]
Then: the events are independent