the height of men in the us follow normal distribution with mean 69 inches and standard deviation 2.25.

what percent of men are between 64.5 and 73.5 inches tall?

what percent of men are taller than 71.25 inches?

what is your z score? for ladies N(64,2)

what percent of the population is shorter than you?

what is the height that 90% of men in the us are taller than?

Answer:

I believe the answer would be d

Step-by-step explanation:

Answer:

D

Step-by-step explanation:

The closest value to the circumference of the given wheel is 424.35 meters.

A wheel has a radius of 67.5 meters. What is closest to the circumference of this wheel?

The circumference of a circle is the distance around its edge or perimeter. The formula for the circumference of a circle is given by:

Circumference = 2πr, where r is the radius of the circle and π (pi) is a mathematical constant that approximates to 3.14.Rewriting the formula to find the circumference,

we have:Circumference = 2 × 3.14 × 67.5= 2 × 3.14 × 67.5= 424.35 Meters

Therefore, the closest value to the circumference of the given wheel is 424.35 meters.

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To determine which proposal(s) to select, we need to compare the present worth or net present value (NPV) of each proposal. The NPV represents the difference between the present value of cash inflows and outflows for each proposal.

For independent proposals at MARR = 15.5% per year:

Calculate the NPV for each proposal using the cash inflows and outflows and discounting them to present value using the MARR of 15.5%.

Select the proposal(s) with a positive NPV. Positive NPV indicates that the project's expected cash inflows exceed the initial investment and the MARR.

For mutually exclusive proposals at MARR = 10% per year:

Calculate the NPV for each proposal using the cash inflows and outflows and discounting them to present value using the MARR of 10%.

Select the proposal with the highest positive NPV. The proposal with the highest positive NPV indicates the project that generates the highest expected return or value relative to the MARR.

For mutually exclusive proposals at MARR = 14% per year:

Calculate the NPV for each proposal using the cash inflows and outflows and discounting them to present value using the MARR of 14%.

Select the proposal with the highest positive NPV. The proposal with the highest positive NPV indicates the project that generates the highest expected return or value relative to the MARR.

It's important to note that the specific details of the proposals, including cash inflows, outflows, and timing, are needed to calculate the NPV accurately. Without this information, it is not possible to provide a definitive answer.

Answer:

Get an answer for 'The equation(k+3)x^2+6x+k = 5, where k is a constant, has two distinct real solutions for x.Show that k satisfies k^2-2k-24<0' and find ...Step-by-step explanation:

Answer:6

Step-by-step explanation:

6 times 6 is 36

Thesis Proposal: Mathematical Modelling of Pollutants in Tano River in Ghana- Background to the Study,  Statement of the Problem, Research Questions,   Literature Review, Research design,  Theoretical model,  Empirical Model.

a. Background to the Study:

The Tano River in Ghana is a vital water resource that supports various ecological systems and provides water for domestic, agricultural, and industrial purposes. However, the river is facing pollution challenges due to human activities, such as industrial waste discharge, agricultural runoff, and improper waste management. The accumulation of pollutants in the Tano River poses a significant threat to aquatic life and the overall environmental health of the region. Therefore, it is crucial to develop a comprehensive understanding of pollutant dynamics in the Tano River to implement effective pollution management strategies.

b. Statement of the Problem:

The pollution levels in the Tano River are increasing, which has detrimental effects on the river's water quality and ecosystem. Traditional monitoring and assessment methods have limitations in providing a complete understanding of the pollutant dynamics. Therefore, there is a need to employ mathematical modelling techniques, specifically ordinary differential equations (ODEs), to develop a quantitative framework for predicting and analyzing pollutant concentrations in the Tano River.

c. Research Questions:

What are the primary sources of pollutants in the Tano River?

How do pollutants disperse and transport in the river system?

What are the factors influencing pollutant degradation and removal processes in the river?

Can mathematical modelling using ODEs accurately predict pollutant concentrations in the Tano River?

d. Literature Review:

The literature review will explore existing studies on pollution in river systems, particularly focusing on mathematical modelling approaches using ODEs. It will examine relevant research on pollutant sources, transport mechanisms, degradation processes, and their application in predicting pollutant concentrations. Additionally, it will review studies that have employed mathematical modelling in similar river systems to gain insights into their methodologies, limitations, and key findings.

e. Research Design:

The research will involve collecting water samples from various locations along the Tano River and analyzing them for pollutant concentrations. Data on pollutant sources, hydrological parameters, and environmental factors will also be collected. The collected data will be used to calibrate and validate the mathematical model. The research design will include field measurements, laboratory analysis, data collection, and model development and validation.

f. Theoretical Model:

The theoretical model will be based on ordinary differential equations to describe the pollutant dynamics in the Tano River. The model will incorporate factors such as pollutant sources, transport mechanisms (advection and dispersion), degradation processes, and removal mechanisms. The model will be formulated based on the mass balance principle and relevant reaction kinetics.

g. Empirical Model:

The empirical model will be developed by calibrating and validating the theoretical model using the collected data. Statistical techniques and optimization algorithms will be employed to estimate model parameters and assess the model's performance in predicting pollutant concentrations. The empirical model will serve as a tool for simulating pollutant dynamics and conducting scenario analysis to evaluate the effectiveness of potential pollution management strategies.

In conclusion, this thesis proposal aims to develop a mathematical model using ordinary differential equations to understand and predict the dynamics of pollutants in the Tano River in Ghana. The research will contribute to the field of environmental science and provide valuable insights for policymakers and stakeholders in implementing effective pollution management strategies to safeguard the Tano River's ecosystem and ensure sustainable water resources.

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Answer: I think............576?

Step-by-step explanation: first you  have to figure out how many weeks are in a month. there are 48 then sense she walks 3 times in a week ou times that by 48 you get 48x3=144 then 144x4=576.

  hopefully i'm right

Answer:

624 miles a year.

Step-by-step explanation

first you have to multiply the 4 miles she walks by the 3 times a week.

therefore 4x3=12 and she walks 12 miles a week.

then multiply 12 by the amount of weeks there are in a year which is 52.

52x12= 624.

therefore she walks 624 miles a year

The required rate of return (or minimum acceptable rate of return) is 20 percent. If the net cash flows are $15,000 per year for ten years, the total cash flow is $150,000. The project's cost is $47,500. We can now apply the net present value formula to determine whether or not the project is feasible.

Net Present Value (NPV) = Cash flow / (1 + r)^n - Cost Where, r is the discount rate, n is the number of years, and Cost is the initial outlay.

Net Present Value = 150000 / (1 + 0.20)^10 - 47500

Net Present Value = $67,482.22

Since the NPV is positive, the project is feasible. When calculating net present value, it's important to remember that a positive NPV implies that the project is expected to generate a return that exceeds the cost of capital, whereas a negative NPV indicates that the project is expected to generate a return that is less than the cost of capital, and as a result, it should be avoided.

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Answer:

If you are a freshman, then you are required to attend orientation

Step-by-step explanation:

The if part is  the given part

The then part is what is going to happen

If you are a freshman, then you are required to attend orientation

Answer:

The area of trapezoid is 14m².

Step-by-step explanation:

Given that tha area of trapezoid is A = 1/2×(a+b)xh where a, b represents the side lengths and h is the height. So you have to substitute the values into the expressions :

[tex]area = \frac{1}{2} \times (a + b) \times h[/tex]

[tex]let \: a = 5,b = 2,h = 4[/tex]

[tex]area = \frac{1}{2} \times (5 + 2) \times 4[/tex]

[tex]area = 2 \times 7[/tex]

[tex]area = 14 \: {m}^{2} [/tex]

To apply the Mean Value Theorem to the function f(x) = 23 - 3x + 2 on the interval (-2, 2), we need to check if the function satisfies the conditions of being continuous on [-2, 2] and differentiable on (-2, 2).

The given function f(x) = 23 - 3x + 2 is a linear function, and linear functions are continuous and differentiable everywhere. Therefore, f(x) is continuous on [-2, 2] and differentiable on (-2, 2). According to the Mean Value Theorem, there exists at least one number c in the interval (-2, 2) such that:

[tex]f'(c) = (f(2) - f(-2)) / (2 - (-2))[/tex]

To find the possible value(s) of c, we need to find the derivative of f(x): f'(x) = -3 Since the derivative is a constant (-3) and does not depend on x, it is the same for all values in the interval (-2, 2). Therefore, the possible value(s) for c is any number in the interval (-2, 2). In other words, c can be any real number between -2 and 2.

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The cost price of a swim-suit, C.P.=$8

Option 1:

If the selling price is marked up by 25%, the new selling price is

[tex]S.P.=C.P.+C.P.\times 25\%[/tex]

[tex]=8+8\times\frac{25}{100}[/tex]

=8+2

=10

So, the selling price will be $10 which is the same as the mentioned selling price.

Hence, this option is correct.

Option 2:

If the selling price is marked up by 40%, the new selling price is

[tex]S.P.=C.P.+C.P.\times 40\%[/tex]

[tex]=8+8\times\frac{40}{100}[/tex]

=8+3.20

=11.20

So, the selling price will be $11.20 which is not the same as the mentioned selling price, $7.50.

Hence, this option is wrong.

Option 3:

If the selling price is marked up by 55%, the new selling price is

[tex]S.P.=C.P.+C.P.\times 55\%[/tex]

[tex]=8+8\times\frac{55}{100}[/tex]

=8+4.40

=12.40

So, the selling price will be $12.40 which is not the same as the mentioned selling price, $5.50.

Hence, this option is wrong.

Option 4:

If the selling price is marked up by 70%, the new selling price is

[tex]S.P.=C.P.+C.P.\times 70\%[/tex]

[tex]=8+8\times\frac{70}{100}[/tex]

=8+5.60

=13.60

So, the selling price will be $13.60 which is the same as the mentioned selling price.

Hence, this option is correct.

Option 5:

If the selling price is marked up by 75%, the new selling price is

[tex]S.P.=C.P.+C.P.\times 75\%[/tex]

[tex]=8+8\times\frac{75}{100}[/tex]

=8+6

=14

So, the selling price will be $14 which is the same as the mentioned selling price.

Hence, this option is correct.

Answer:    A,D,E

Step-by-step explanation:

Answer: $150

Step-by-step explanation:

From the question, we are informed that the balance of Stephanies average balance checking account at the beginning of last cycle was $200 and that the only transaction for the cycle was a check that Stephanie wrote for $100 which cleared exactly halfway through the cycle.

Since the $100 check was cleared halfway, the amount that Stephanies checking account will pay interest last cycle will be for us to deduct half of $100 from $200. This will be:

= $200 - 1/2($100)

= $200 - $50

= $150

Answer:

The distance from it is 1, -5

Step-by-step explanation:

The optimal solution for the given problem, obtained graphically, is x1 = 150 and x2 = 100, with a maximum total profit of 750. The primal problem indicates that all resources and requirements are satisfied. The dual variables associated with the machine hours and item 2 are both zero.

To find the optimal solution graphically, we plot the feasible region determined by the given constraints. The constraint 5x1 + 4x2 ≤ 1800 represents the available machine hours, while x1 ≥ 100 and x2 ≥ 50 represent the minimum demand for item 1 and item 2, respectively. Additionally, x1 ≥ x2 ensures that the number of items produced of type 1 is greater than or equal to the number of items produced of type 2.
By graphing these constraints, we identify the feasible region, which is the area where all constraints are satisfied. The objective function, Z = 2x1 + 3x2, represents the total profit. To maximize Z, we find the corner point within the feasible region that yields the highest profit. In this case, the optimal solution is x1 = 150 and x2 = 100, resulting in a maximum total profit of 750.
From the primal problem, we observe that all resources and requirements are met. The available machine hours (1800) are not fully utilized, and the minimum demands for item 1 (100) and item 2 (50) are both satisfied.
For the dual variables, associated with the machine hours and item 2, we find that both are zero. This indicates that there is no shadow price or economic interpretation for these constraints in the primal problem. The optimal value of the dual variable associated with the machine hours represents the rate of change in the objective function per unit increase in the available machine hours, and since it is zero, it implies that the objective function does not change with additional machine hours. Similarly, the dual variable for item 2 being zero suggests that the objective function is not affected by changes in the demand for item 2.
In summary, the optimal solution of x1 = 150 and x2 = 100 maximizes the total profit to 750. The primal problem shows that all resources and requirements are satisfied, and the dual variables associated with machine hours and item 2 are both zero, indicating no economic interpretation for these constraints in the primal problem.

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the complete question is:

     max Z=2x1+3x2
s. t.
5x1 + 4x2 ≤ 1800
(Time in hours on machine)
x1≥ 100 (Demand on item 1)
x2 ≥ 50
(Demand on item 2)
x1>=x2(Number of items produced of type 1>=N)
where x1 is the number of items produced of type 1, x2 is the numb total profit.
A. Find the optimal solution of the primal graphically B. Determine the status of resources and requirements froC. From part (A), find the optimal value of the dual vari hours on machine
D. From part (A), find the optimal value of the dual vv
item 2'

The given differential equation is y' - y = e^(2x). Find the constant solutions, if any, that were lost in the solution of the differential equation.Solution:We are given a differential equation: y' - y = e^(2x)This is a linear, first order differential equation.

The general solution of this differential equation can be found by first solving the homogeneous differential equation:y' - y = 0The solution to the homogeneous differential equation is y = Ce^x, where C is the constant of integration.Now, we solve for the particular solution to the non-homogeneous differential equation. The method of variation of parameters can be used to solve this non-homogeneous differential equation.y' - y = e^(2x)

First, we find the complementary function, which is the solution to the homogeneous differential equation:y_c = Ce^xThe particular solution to the non-homogeneous differential equation is of the formThus, the constant solution that was lost in the solution of the differential equation is y = 0, which is the solution to the homogeneous differential equation.

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f(x) goes to -2. The end behavior of f(x) is that f(x) goes to -2 as x goes to infinity.

The end behavior of a function describes what happens to the function's values as the input (x) approaches positive or negative infinity.

For the given function f(x) = 2 - 2 as x goes to infinity, the end behavior can be determined by observing the constant term (-2) in the expression.

As x approaches positive infinity, the value of the function f(x) approaches the constant term (-2). Therefore, the correct answer is: The end behavior of f(x) is that f(x) goes to -2 as x goes to infinity.

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What is the end behavior of [tex]f(x) = 2^{-x} + 2[/tex] as x goes to infinity?

O f(x) goes to -2

O f(x) goes to -4 f(x) goes to infinity

O f(x) goes to negative infinity

O f(x) goes to 0

The correct statement is the length of the CD is 28 units.

It is a polygon that has four sides and four corners. The sum of the internal angle is 360 degrees.

Given that, ABCD is a kite, Length AB = 3x + 1

Length AD = 4x

Length BC = 22

Finding the length of CD :-

We know that the adjacent sides are equal, that is

AB = BC

3x + 1 = 22

3x = 21

x = 7

Similarly,

AD = CD

4x = CD

CD = 4(7)

CD = 28

Thus, the length of CD is 28 units.

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The figure of the question attached

Answer:

25w+10m+8c≥4300 (w: # of women, m: men, c: children)

Step-by-step explanation:

Answer:

28 dollars

Step-by-step explanation:

27 minus 13 equals 14. Which is the first part of the answer.Then 14 'twice' is times 2. So 14 x 2 is 28. Elana made 28 dollars

Answer:

$80

Step-by-step explanation:

27 + 13 = 40

40*2=80

The mean curvature H at a point p on a surface S is given by the equation 1/H = (1/π) ∫k₂(0) dθ, where k₂(0) represents the normal curvature at p along a direction making an angle θ with a fixed direction.

The mean curvature of a surface measures how the surface curves at a particular point. It is defined as the average of the principal curvatures, which represent the curvatures along the principal directions of the surface. To derive the formula, we consider a point p on the surface S and choose a fixed direction. We then consider a family of curves on the surface passing through p and parametrized by the angle θ they make with the fixed direction.

The normal curvature k₂(0) at p along each curve in this family can be computed. Integrating the normal curvature over the range of angles θ gives us the total contribution to the mean curvature. Dividing this by π (which represents the total range of angles) gives us the average, and taking the reciprocal gives us the formula 1/H = (1/π) ∫k₂(0) dθ, where H represents the mean curvature at point p on the surface S.

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The test light illuminates when the park light is probed, this indicates that the circuit is complete and that the light bulb is faulty.

When the alligator clip on a test light is placed on the negative battery post and the probe is then touched to both terminals of a park light that is turned on but not lighting, the test light lights up whenever either of the terminals is probed. What does this mean?A test light is a handy diagnostic tool for checking the operation of the electrical circuits in your vehicle, such as a car or truck. It's particularly useful in situations where the circuit can't be tested using a multimeter. A test light works by completing a circuit with a source of voltage through a filament bulb. This indicates that the circuit being tested is complete. If the circuit is open, the light will not illuminate.The test light is placed on the negative battery post to complete the circuit. Whenever either of the terminals is probed, the test light illuminates. This indicates that the circuit is complete, which means that the light bulb is faulty. The test light will illuminate if the circuit is complete. A test light can be used to verify the presence of voltage on a wire or connector without the need for a voltmeter to measure the voltage level.

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Answer:

La semana pasada, Chen compró galones de gasolina a por galón. Esta semana, compró  galones de gasolina a  dólares el galón.

Step-by-step explanation:

1.3, because 1.3 cannot change.

When we draw a card from a standard deck of 52 cards, the total number of possible outcomes is 52 cards. This means that there are 52 equally likely outcomes.Now, we need to find the probability of drawing either a ten or a two.

There are four tens (10 of hearts, 10 of diamonds, 10 of clubs, 10 of spades) and four twos (2 of hearts, 2 of diamonds, 2 of clubs, 2 of spades) in a deck of 52 cards.Therefore, the number of favorable outcomes is 4 (four tens and four twos).So, the probability of drawing either a ten or a two can be found as follows:P(event) = number of favorable outcomes/total number of outcomesP(drawing a ten or a two) = 4/52 = 1/13This is the required probability.Now, we need to find the probability of drawing either a ten or a heart.

There are four tens (10 of hearts, 10 of diamonds, 10 of clubs, 10 of spades) and 13 hearts (including 10 of hearts) in a deck of 52 cards.Therefore, the number of favorable outcomes is 4 + 13 - 1 (10 of hearts was counted twice) = 16.So, the probability of drawing either a ten or a heart can be found as follows:P(event) = number of favorable outcomes/total number of outcomesP(drawing a ten or a heart) = 16/52 = 4/13This is the required probability.

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Given function:y = √(1 – x³)We need to find dy/dx.As per the chain rule of differentiation, if y = f(u) and u = g(x), then the derivative of y with respect to x is given by dy/dx = dy/du * du/dx.

Now, let u = 1 – x³. Then, y = √u ⇒ y = u^(1/2).

dy/dx = dy/du * du/dxdy/du = 1/(2√u) = 1/(2√(1 – x³))du/dx = -3x²Therefore, dy/dx = dy/du * du/dx = 1/(2√(1 – x³)) * (-3x²) = (-3x²)/(2√(1 – x³)).

Therefore,  (A) 3(1 - x²)².Option (A) is the correct answer.

The given function is y = √(1 – x³) and we need to find dy/dx. As per the chain rule of differentiation, if y = f(u) and u = g(x), then the derivative of y with respect to x is given by dy/dx = dy/du * du/dx.

Let u = 1 – x³. Then, y = √u ⇒ y = u^(1/2).

We need to find dy/dx.dy/dx = dy/du * du/dxdy/du = 1/(2√u) = 1/(2√(1 – x³))du/dx = -3x².

Therefore, dy/dx = dy/du * du/dx = 1/(2√(1 – x³)) * (-3x²) = (-3x²)/(2√(1 – x³)).

Thus, dy/dx = (-3x²)/(2√(1 – x³)).Therefore, the correct option is (A) 3(1 - x²)².  

The derivative of the given function y = √(1 – x³) with respect to x is (-3x²)/(2√(1 – x³)) and the correct option is (A) 3(1 - x²)².

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The exact value of cos 8 using the double angle identities is (√3 + √5)/4.

I can help you find the exact values of sin 105 and cos 8 using the double angle identities. Let's start with sin 105.

To find sin 105, we can use the fact that sin(2θ) = 2sin(θ)cos(θ). We can rewrite 105 as the sum of two angles:

105 = 60 + 45

Using the double angle identity sin(2θ) = 2sin(θ)cos(θ), we have:

sin 105 = sin (60 + 45)

= sin 60 cos 45 + cos 60 sin 45

= (√3/2)(√2/2) + (1/2)(√2/2)

= (√6 + √2)/4

So, the exact value of sin 105 using the double angle identities is (√6 + √2)/4.

Now let's find cos 8 using the double angle identities.

To find cos 8, we'll use the fact that cos(2θ) = cos^2(θ) - sin^2(θ). We can rewrite 8 as the difference of two angles:

8 = 45 - 37

Using the double angle identity cos(2θ) = cos^2(θ) - sin^2(θ), we have:

cos 8 = cos (45 - 37)

= cos 45 cos 37 + sin 45 sin 37

= (√2/2)(√6/4) + (√2/2)(√10/4)

= (√12 + √20)/8

= (√3 + √5)/4

So, the exact value of cos 8 using the double angle identities is (√3 + √5)/4.

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Answer:

B. √2

Step-by-step explanation:

First, rationalise the fraction so that the denominator is a whole number.

10 *  √50

⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻

√50 * √50

 10 √50

⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻

    50

√50 can be simplified as 5√2

10 *5√2 = 50√2

50√2

⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻⁻

 50

- The 50's cancel out and you are left with √2