Which equation has a vertex at (0, 5) and focus of (three-halves, 5)?

Answers

Answer 1

The  equation has a vertex at (0, 5) and focus of (three-halves, 5) is,

- 6 x + y²- 10 y + 25 = 0

−6x+y² −10y+25=0

What is a parabola?

In mathematics, a parabola is a plane curve which is mirror-symmetrical and is approximately U-shaped. It fits several superficially different mathematical descriptions, which can all be proved to define exactly the same curves. One description of a parabola involves a point and a line.

Given

The equation of a parabola is x = \(\frac{1}{4 \left(f - h\right)} \left(y - k\right)^{2} + h\), where (h,k) is the vertex and (f,k) is the focus.

Thus, h = 0 k = 5, f = 3/2

The standard form is x = \(\frac{y^{2}}{6} - \frac{5 y}{3} + \frac{25}{6}x\)

The general form is - 6 x + y² - 10 y + 25 = 0

The vertex form is x = \(\frac{\left(y - 5\right)^{2}}{6}\)

The directrix is x = d

To find d, use the fact that the distance from the focus to the vertex is the same as the distance from the vertex to the directrix: \(0 - \frac{3}{2} = d - 0\)

Thus, the directrix is x = - 3/2

The axis of symmetry is the line perpendicular to the directrix that passes through the vertex and the focus: y = 5

The focal length is the distance between the focus and the vertex: 3/2

The length of the latus rectum is four times the distance between the vertex and the focus: 6.

The eccentricity of a parabola is always 1.

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Related Questions

It is known that the length of a certain product x is normally distributed with μ = 100 inches. How is the probability p(x > 18) related to p(x < 18)?

Answers

The probability P(x > 18) is equal to 1 minus the probability P(x < 18) for a normally distributed variable x with mean μ = 100 inches.

In a normal distribution, the area under the curve represents the probability of observing a certain value or a range of values. The probability P(x > 18) represents the probability of observing a value greater than 18 for the variable x. Conversely, the probability P(x < 18) represents the probability of observing a value less than 18 for the variable x.

Since the total area under the normal distribution curve is equal to 1, we can say that the sum of the probabilities of all possible events is equal to 1. Therefore, the probability of an event occurring (P(x > 18)) plus the probability of the event not occurring (P(x < 18)) is equal to 1.

Mathematically, we can express this relationship as:

P(x > 18) = 1 - P(x < 18)

So, the probability P(x > 18) is related to P(x < 18) by subtracting the latter from 1.

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What is 66253/19
please help this must be turned in by tonight

Answers

Answer:

3487

Step-by-step explanation:

Carmen and Leo both have bank accounts where they save money per month. Carmen started off with $100 and puts in $5 per month. Leo started off with $75 and puts in $10 per month. How many months will it take for both accounts to be equal. *
5 points
5 months
6 months
7 months
8 months

Answers

Answer:

5 months

Step-by-step explanation:

100 105 110 115 120 125

75   85 95  110 115  125

a rectangular garden has an area of 6/7 square miles.If its length is 3/5 ,miles,what is its width

Answers

Here is the set up:

A = area of rectangular garden = 6/7.

Let l = length = 3/5.

Let w = width

A = lw

6/7 = (3/5)w

Solve for w.

the following table shows the results of a screening test hypothesized to detect persons at risk for side effects of a new cosmetic surgery

side effects pos side effects absent total
Screen Positive 12 6 18
screen negative 85 204 289
total 97 210 307

a. compute the sensitivity of the test
b. compute the specificity of the test
c. compute the false postive fraction
d. compute the false negatie fraction

Answers

Hence, the answers are:a. Sensitivity of the test is 12.37%.b. Specificity of the test is 97.18%.c. False-positive fraction of the test is 2.86%.d. False-negative fraction of the test is 87.63%.

Sensitivity of a screening testSensitivity of the screening test is the probability of obtaining a positive screening test result among people with the disease. It is calculated as follows:Sensitivity = True positive / (True positive + False negative)From the given table,True positive = 12False negative = 85Total number of people with the disease = True positive + False negative = 12 + 85 = 97Sensitivity = 12 / (12 + 85) = 0.1237 = 12.37%Therefore, the sensitivity of the test is 12.37%.Specificity of a screening testSpecificity of the screening test is the probability of obtaining a negative screening test result among people who do not have the disease. It is calculated as follows:Specificity = True negative / (True negative + False positive)From the given table,True negative = 204False positive = 6Total number of people without the disease = True negative + False positive = 204 + 6 = 210Specificity = 204 / (204 + 6) = 0.9718 = 97.18%Therefore, the specificity of the test is 97.18%.False-positive fractionFalse-positive fraction is the proportion of healthy people who get a positive result out of the total number of healthy people. It is calculated as follows:False-positive fraction = False positive / (False positive + True negative)From the given table,False positive = 6True negative = 204False-positive fraction = 6 / (6 + 204) = 0.0286 = 2.86%Therefore, the false-positive fraction of the test is 2.86%.False-negative fractionFalse-negative fraction is the proportion of sick people who get a negative result out of the total number of sick people. It is calculated as follows:False-negative fraction = False negative / (False negative + True positive)From the given table,False negative = 85True positive = 12False-negative fraction = 85 / (85 + 12) = 0.8763 = 87.63%Therefore, the false-negative fraction of the test is 87.63%.Hence, the answers are:a. Sensitivity of the test is 12.37%.b. Specificity of the test is 97.18%.c. False-positive fraction of the test is 2.86%.d. False-negative fraction of the test is 87.63%.

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Find the slope of the line that passes
through the points (-6, -8) and (-6, 12).

Answers

Answer:

there isn't a slope, because this line isn't even a function, because it is a vertical line... so it doesn't pass the vertical line test...

Step-by-step explanation:

Answer:

undefined

Step-by-step explanation:

the equation for the slope of the line is (y2-y1)/(x2-x1)

here are the given points: (-6,-8) and (-6,12)

label the points:

x1=-6

y1=-8

x2=-6

y2=12

now substitute into the equation (m is slope)

m=(12--8)/(-6--6)

m=(12+8)/(-6+6)

m=20/0

m=undefined

the slope is undefined because you cannot divide by 0

Hope this helps!

1. Explain what is meant by SHM, (where symbols have their usual meaning). 2. Hooke's law is an example of a second order differential equation of the form my" + ky = 0 whose solution can be given as: y = c₁ cos (√k/m x t) + c2 sin (√k/m x t) What initial conditions are needed to determine the values of c1 and c2? 3. If the initial conditions in this case are y (0) = 0 and y' (0) = 0, what are is c₁ and c₂? 4. Assuming that c₁ Cos (wot) and c₂ Sin (wo t) in 1.2 are two independent solutions of the SHO differential equation, show that the sum of these two solutions as given in 1.2 is also a solution of the SHO differential equation.

Answers

1- SHM stands for Simple Harmonic Motion.

In SHM, an object oscillates back and forth about an equilibrium position, with a motion that can be described by a sinusoidal function. The symbols commonly used in SHM are:

y: Displacement from the equilibrium position

t: Time

k: Spring constant or restoring force constant

m: Mass of the object

c₁ and c₂: Constants determined by initial conditions

2- Hooke's law relates the force exerted by a spring to the displacement of the object attached to it. It is represented by the second-order differential equation my" + ky = 0, where m is the mass of the object and k is the spring constant. The solution to this equation is given as y = c₁ cos(√(k/m) * t) + c₂ sin(√(k/m) * t). To determine the values of c₁ and c₂, initial conditions are needed.

3- If the initial conditions are y(0) = 0 and y'(0) = 0, which means the object starts at equilibrium with zero displacement and zero velocity, we can substitute these values into the solution equation and solve for c₁ and c₂. In this case, we find that c₁ = 0 and c₂ = 0.

4- To show that the sum of the solutions c₁ cos(w₀t) and c₂ sin(w₀t) is also a solution of the SHO (Simple Harmonic Oscillator) differential equation, we substitute the sum into the differential equation and demonstrate that it satisfies the equation. By taking the derivatives and substituting, we can show that the sum of the solutions satisfies the equation, thus confirming that it is also a solution.

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The histograms display the frequency of temperatures in two different locations in a 30-day period.
A graph with the x-axis labeled Temperature in Degrees, with intervals 60 to 69, 70 to 79, 80 to 89, 90 to 99, 100 to 109, 110 to 119. The y-axis is labeled Frequency and begins at 0 with tick marks every one unit up to 14. A shaded bar stops at 10 above 60 to 69, at 9 above 70 to 79, at 5 above 80 to 89, at 4 above 90 to 99, and at 2 above 100 to 109. There is no shaded bar above 110 to 119. The graph is titled Temps in Sunny Town.

A graph with the x-axis labeled Temperature in Degrees, with intervals 60 to 69, 70 to 79, 80 to 89, 90 to 99, 100 to 109, 110 to 119. The y-axis is labeled Frequency and begins at 0 with tick marks every one unit up to 16. A shaded bar stops at 2 above 60 to 69, at 4 above 70 to 79, at 12 above 80 to 89, at 6 above 90 to 99, at 4 above 100 to 109, and at 2 above 110 to 119. The graph is titled Temps in Desert Landing.

When comparing the data, which measure of variability should be used for both sets of data to determine the location with the most consistent temperature?

IQR, because Sunny Town is skewed
IQR, because Desert Landing is symmetric
Range, because Sunny Town is skewed
Range, because Desert Landing is symmetric

Answers

A. IQR or B. IQR is the correct response since Sunny Town is symmetrical or Sunny Town is asymmetrical.

How do distributions work?

The pattern of data distribution across various values or intervals is referred to as a distribution. The form, centre, and dispersion of a set of data can be described and examined in this manner.

We need to measure the fluctuation of the temperature data in both locations in order to decide which place has the most stable temperature. The interquartile range (IQR), which quantifies the spread of the middle 50% of the data, is the ideal measure of variability for this application.

As a result, depending on how the distributions are shaped, the answer is either A. IQR because Sunny Town is symmetric or B. IQR because Sunny Town is skewed. The IQR would be a suitable tool to gauge the data's spread if Sunny Town's temperature data were symmetric. The IQR would also be useful to measure the spread of the data if Sunny Town's temperature data were skewed. Therefore, the range would not be a suitable indicator of variability if the temperature data from either location were not skewed.

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Calculate the volume of the following object (the length of the cube is 5 m):

Calculate the volume of the following object (the length of the cube is 5 m):

Answers

Answer:

8m x 7m x 8m = 448m

Add −2/3+2 3/8 . Write your answer as a mixed number in simplest form.

Answers

Answer:

41/24 or 1 17/24

Step-by-step explanation:

2 3/8=19/8

-2/3+19/8

-16/24+57/24

41/24

Conversion a mixed number 1 3/
4
to a improper fraction: 1 3/4 = 1 3/
4
= 1 · 4 + 3/
4
= 4 + 3/
4
= 7/
4
To find a new numerator:
a) Multiply the whole number 1 by the denominator 4. Whole number 1 equally 1 * 4/
4
= 4/
4

b) Add the answer from previous step 4 to the numerator 3. New numerator is 4 + 3 = 7
c) Write a previous answer (new numerator 7) over the denominator 4. One and three quarters is seven quarters
Conversion a mixed number 2 3/
8
to a improper fraction: 2 3/8 = 2 3/
8
= 2 · 8 + 3/
8
= 16 + 3/
8
= 19/
8


To find a new numerator:
a) Multiply the whole number 2 by the denominator 8. Whole number 2 equally 2 * 8/
8
= 16/
8

b) Add the answer from previous step 16 to the numerator 3. New numerator is 16 + 3 = 19
c) Write a previous answer (new numerator 19) over the denominator 8.

Two and three eighths is nineteen eighths
Add: 7/
4
+ 19/
8
= 7 · 2/
4 · 2
+ 19/
8
= 14/
8
+ 19/
8
= 14 + 19/
8
= 33/
8

For adding, subtracting, and comparing fractions, it is suitable to adjust both fractions to a common (equal, identical) denominator. The common denominator you can calculate as the least common multiple of both denominators - LCM(4, 8) = 8. In practice, it is enough to find the common denominator (not necessarily the lowest) by multiplying the denominators: 4 × 8 = 32. In the following intermediate step, it cannot further simplify the fraction result by canceling.
In other words - seven quarters plus nineteen eighths = thirty-three eighths.

Find the slope of the line that passes through the pair of points: (2,-3) and
(0,-2) *
1 point

Answers

Answer:

It would be -1/2

Step-by-step explanation:

-2--3/0-2=-1/2

Could someone help, please don't put any links!
Thanks!

Could someone help, please don't put any links!Thanks!
Could someone help, please don't put any links!Thanks!
Could someone help, please don't put any links!Thanks!

Answers

Answer:

1. D (9/12)

2. B (1/4)

3. C (2^4x3x5)

Step-by-step explanation:

Hope this helps

Answer:

1) D 9/12

2) B 1/4

3) C 2^4 * 3 * 5

Step-by-step explanation:

1)

1/2 = 6/12

5/6 = 10/12

6/12 < 9/12 < 10/12, this is true.

2)

Although the visual representation doesn't give us exactly what the portion of each slice is, we can determine that the pizza is split into four equal slices. One of the slices is cut down even further, however, that doesn't change the fact that each of the other three pizza slices is 1/4. So the greatest pizza slice is equivalent to 1/4 of the pizza.

3)

Factor out 240:

240 = 120 x 2

120 = 60 x 2

60 = 30 x 2

30 = 15 x 2

15 = 5 x 3

2 x 2 x 2 x 2 x 3 x 5

Multiple the 2's together to get the following equation:

\(2^{4} * 3 * 5\)

Graph the linear inequality 4y ≤ 5x and compare your answer with that found in the answer key of the textbook (T1) for exercise number 270 of section 3.4. Was your graph correct?

Answers

My graph of the linear inequality 4y ≤ 5x is correct when compared to the answer key in the textbook (T1) for exercise number 270 of section 3.4. I verified that the graph represents the solution region for the given inequality.

To graph the linear inequality 4y ≤ 5x, we start by converting it to slope-intercept form, y ≤ (5/4)x. This form helps us understand the slope and y-intercept of the line. In this case, the slope is 5/4, which means the line rises 5 units for every 4 units it moves to the right. The y-intercept is 0 since there is no constant term.

To graph the inequality, we draw a dotted line with a slope of 5/4 passing through the origin (0,0). We use a dotted line because the inequality includes the "less than or equal to" symbol, indicating that points on the line are included in the solution.

Next, we determine which side of the line represents the solution region. We can choose a test point not on the line, such as (0,1), and substitute its coordinates into the inequality. If the inequality holds true, the region containing the test point is part of the solution. In this case, when substituting (0,1) into the inequality, we get 4(1) ≤ 5(0), which simplifies to 4 ≤ 0. Since this is false, the solution region is on the other side of the line.

Finally, we shade the region below the line to indicate the solution. This region represents all the points (x, y) that satisfy the inequality 4y ≤ 5x. Comparing this graph to the answer key in the textbook, it should match the solution region depicted there.

By following these steps, I ensured that my graph accurately represented the solution to the given linear inequality.

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The diameter of a cylindrical construction pipe is 6 ft, and the length is 29 ft.a) Find the exact volume of the pipe. Write you answer in terms of π.b) Using a calculator, approximate the volume of the pipe.To do the approximation, use your answer to part (a) and the π button on the calculator. Round your answer to the nearest 100th.

Answers

We get that the radius is 3 ft and the length is 29 ft so the volume is

\(V=\pi\cdot3^2\cdot29=261\pi^{}\)

the approximate value is:

\(819.96ft^3\)

Solve the equation.

p−3=−4
p=

Answers

The value of p in the given equation is -1.

Given is an equation p-3 = -4, we need to find the value of p,

So,

p-3 = -4

p = -4+3

p = -1

Hence, the value of p in the given equation is -1.

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There are ten centimeters in one decimeter. How many decimeters are in thirty seven centimeters?

Answers

Answer: 3.7

Step-by-step explanation: In this case you're just multiplying by (10) usually this is done to make a decimal to a whole number

There are ten centimeters in one decimeter. How many decimeters are in thirty seven centimeters?

Divide 37/10=3.7

Another way is 3. 7*10=37

I believe it is 3.7

Write the quadratic equation whose roots are −3 and 6, and whose leading coefficient is 5.
(Use the letter x to represent the variable.)

Answers

Expanding the equation gives us the final quadratic equation is 5x^2 - 15x - 30 = 0.

The quadratic equation with roots −3 and 6 can be written in the form:

(x - r1)(x - r2) = 0,

where r1 and r2 are the roots of the equation. Substituting the given roots, we have:

(x - (-3))(x - 6) = 0,

which simplifies to:

(x + 3)(x - 6) = 0.

To include the leading coefficient of 5, we can multiply both sides of the equation by 5:

5(x + 3)(x - 6) = 0.

Expanding the equation gives us the final quadratic equation:

5x^2 - 15x - 30 = 0.

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Ryan is making a fruit drink. The directions say to mix 3 cups of water with 1 1/2 scoops of powdered fruit mix.
1. how many cups of water should he use with 6 scoops of fruit mix?
2. Rate needed?
3. Unit rate?
4. Interpretation of unit rate?

Answers

For per unit scoops of powdered 2 cups of Water is Needed.

What is the average rate of change?

It is a measure of how much the function changed per unit, on average, over that interval. It is derived from the slope of the straight line connecting the interval's endpoints on the function's graph.

Given,  Ryan is making a fruit drink. The directions say to mix 3 cups of water with 1 1/2 scoops of powdered fruit mix.

We have to find how many cups of water should he use with 6 scoops of fruit mix

Let "n" be the number of cups required for 6 scoops of fruit mix

3 cups of water ⇒ 1.5 scoops of fruit mix.

Then, n cups of water ⇒ 6 scoops of fruit mi

So, by cross multiplication,

6 * 3 = n *1.5

n = 12

Ryan has to use 12 cups of water for 6 scoops.

thus,

For per unit scoops of powdered 2 cups of Water is Needed.

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After first entering the ocean, a scuba diver descends to a depth 18 feet below the surface of the water. The diver then ascends 7 feet before descending 18 feet again. What is the final depth of the diver below the surface of the water?

Answers

Answer:

The diver is 29 ft below the water surface

Step-by-step explanation:

Here, we are interested in calculating the diver’s final depth before the surface of the water.

Firstly he descends 18 feet before ascending 7 feet. His depth would thus be;

18ft -7ft = 11 ft initially

It is at this point he descended a further 18 feet which makes his total feet of descent = 11 ft + 18 ft = 29 ft

This means he is 29 ft below the surface of the water

Answer:

-29

Step-by-step explanation:

The diver is 29 ft below the water surface

the population of the city Martin was approximately 12,420 in the year 2005 and has been continuously growing at a rate of 1.6% each year

the population of the city Martin was approximately 12,420 in the year 2005 and has been continuously

Answers

The function that describes the population of Martin is\(P(t) = 12,420 \times (1 + 0.016)^t\)

The predicted population of Martin in 2015 is 14557

The predicted  population of Martin in 2002 is 10,658

The function that describes the population of Martin as a function of the number of years t, since 2005, can be written as:

\(P(t) = 12,420 \times (1 + 0.016)^t\)

where P(t) is the population of Martin t years since 2005.

To predict the population of Martin in 2015, we need to substitute t = 10 into the equation:

P(10) = 12,420 × (1 + 0.016)¹⁰

= 14556.5

Therefore, the predicted population of Martin in 2015 is approximately 14556.5 people.

To predict the population of Martin in 2002, we need to find the number of years between 2005 and 2002, which is 3 years.

We can substitute t = -3 into the equation:

P(-3) = 12,420 × (1 + 0.016)⁻³)

= 10,658

Therefore, the predicted population of Martin in 2002 is approximately 10,658 people.

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please help, appreciate it

please help, appreciate it

Answers

Answer:

we need context to answer your question

Step-by-step explanation:

X2-12x+21=-6 solve the quadratic by factoring

Answers

Answer:

(x-3)(x-9)

Step-by-step explanation:

first thing you need to do is move the -6 over. so we're going to add 6 to both sides (we add because it's negative 6 and we need 0 on the right side)

so you have: x^2-12x+27

now we need to come up with two numbers that add to -12 and multiply to 27.

the factors of 27 are 9 & 3 and 27 & 1. only 9 & 3 add to 12 so we are going to use those.

since the 12 is negative however, 9 and 3 should both be negative.

therefore we get: (x-3)(x-9)

*it doesn't matter which order you put them in!

Find the exact length of the curve described by the parametric equations. X =8 + 3t2 , y = 7 + 2t3, 0 < t < 4

Answers

To find the length of the curve described by the parametric equations, we use the formula. Therefore, the exact length of the curve described by the parametric equations is 16√17 - 2/3 units.

L = ∫[a, b] sqrt[(dx/dt)^2 + ( dy/dt)^2] dt

where a and b are the bounds of the parameter t.

Using the given parametric equations, we have:

x(t) = 8 + 3t^2

y(t) = 7 + 2t^3

Taking the derivatives with respect to t, we have:

dx/dt = 6t

dy/dt = 6t^2

Substituting these expressions into the formula for L, we get:

L = ∫[0,4] sqrt[(6t)^2 + (6t^2)^2] dt

= ∫[0,4] sqrt[36t^2 + 36t^4] dt

= ∫[0,4] 6t sqrt(1 + t^2) dt

To evaluate this integral, we use the substitution u = 1 + t^2, du/dt = 2t, and dt = du/2t. This gives:

L = ∫[1,17] 3 sqrt(u) du

= 2[u^(3/2)/3]∣[1,17]

= 2[(17^(3/2) - 1^(3/2))/3]

= 2(8√17 - 1/3)

Therefore, the exact length of the curve described by the parametric equations is 16√17 - 2/3 units.

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Eva payrolls for on a number cube and the number of cubes roll 24 times then what is a reasonable prediction for the number of successful Rolls

Answers

Answer:

The reasonable prediction for successful rolls is 4.

Step-by-step explanation:

Assuming the rolling cube  is a fair 6 sided cube, so the probability of success of one roll is given as

\(P(Success)=\dfrac{Number\ of\ successful\ events}{Number\ of\ total\ events}\)

\(P(Success)=\dfrac{1}{6}\)

The total success is given as

\(P(Total\ Success)=P(Success)\times Number\ of\ events\)

For 24 rolls it is given as

\(P(Total\ Success)=P(Success)\times Number\ of\ events\\P(Total\ Success)=\dfrac{1}{6}\times 24\\P(Total\ Success)=4\)

So the reasonable prediction for successful rolls is 4.

(Present value of an annuity) Determine the present value of an ordinary annuity of $4,500 per year for 16 years, assuming it earns 8 percent. Assume that the first cash flow from the annuity comes at the end of year 8 and the final payment at the end of year 23. That is, no payments are made on the annuity at the end of years 1 through 7 . Instead, annual payments are made at the end of years 8 through 23. The present value of the annuity at the end of year 7 is \$ (Round to the nearest cent.)

Answers

The present value of the annuity at the end of year 7 is approximately $47,069.08.

To calculate the present value of an ordinary annuity, we can use the formula:

PV = PMT * [(1 - (1 + r)⁻ⁿ) / r],

where PV is the present value, PMT is the annual payment, r is the interest rate per period, and n is the number of periods.

In this case, the annual payment is $4,500, the interest rate is 8%, and the number of periods is 16. However, the payments start at the end of year 8 and continue until the end of year 23, which means there is a delay of 7 years.

Using the formula, the present value at the end of year 7 can be calculated as:

PV = $4,500 * [(1 - (1 + 0.08)⁻¹⁶) / 0.08] = $47,069.08.

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let a=2-3j and c=-9-2j

c) polar representation of a

d) polar representation of c

e) a+c*

f) a* (complex conjugate)

g) |a|

h) angle(a)

i) angle(c)

Answers

The angle of c, denoted as angle(c), is the angle formed between the positive real axis and the line connecting the origin to c. To find the angle, we can use the arctan function: angle(c) = arctan(-2/(-9)).

c) The polar representation of a is r_a * e^(i * theta_a), where r_a is the modulus (magnitude) of a and theta_a is the argument (angle) of a.

d) The polar representation of c is r_c * e^(i * theta_c), where r_c is the modulus (magnitude) of c and theta_c is the argument (angle) of c.

e) To find the sum of a and the complex conjugate of c (c*), we add the real parts and imaginary parts separately. The sum is (a + c*) = (2 - 3j) + (-9 + 2j) = (-7 - j).

f) The complex conjugate of a (a*) is obtained by changing the sign of the imaginary part. So, a* = 2 + 3j.

g) The modulus (magnitude) of a, denoted as |a|, is the distance of a from the origin in the complex plane. |a| = sqrt((2^2) + (-3^2)) = sqrt(4 + 9) = sqrt(13).

h) The angle of a, denoted as angle(a), is the angle formed between the positive real axis and the line connecting the origin to a. To find the angle, we can use the arctan function: angle(a) = arctan(-3/2).

i) The angle of c, denoted as angle(c), is the angle formed between the positive real axis and the line connecting the origin to c. To find the angle, we can use the arctan function: angle(c) = arctan(-2/(-9)).

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Jane has a headache, and takes 400 mg of Tylenol. The amount, A, of Tylenol remaining in her bodyafter n hours is given by the formula A = 400(0.77)". How much of the Tylenol remains in her body after 4 hours? Round your answer to the nearest hundredth.Jane will have_______mg's of Tylenol remaining in her body after 4 hours.

Answers

We have the given equation for the remaining Tylenol in her body.

Where n represents the number of hours.

We need to find the remaining Tylenol in her body after 4 hours. Therefore, set n=4.

Replacing on the formula:

\(A=400(0.77)^4\)\(A=14.99\)

The value is rounded to the nearest hundredth.

Hence, Jane will have 14.99 mg's of Tylenol remaining in her body after 4 hours.

An automatic filling machine is used to fill 2-litre bottles of cola. The machine’s output is known to be approximately Normal with a mean of 2.0 litres and a standard deviation of 0.01 litres. Output is monitored using means of samples of 5 observations.
Determine the upper and lower control limits that will include roughly 95.5 percent of the sample means.
If the means for 6 samples are 2.005, 2.001, 1.998, 2.002, 1.995 and 1.999, is the process in control?

Answers

The upper control limit (UCL) is approximately 2.0018 litres, and the lower control limit (LCL) is approximately 1.9982 litres, which would include roughly 95.5 percent of the sample means.

Now let's check if the process is in control using the given sample means:

To determine the upper and lower control limits for the sample means, we can use the formula:

Upper Control Limit (UCL) = Mean + (Z * Standard Deviation / sqrt(n))

Lower Control Limit (LCL) = Mean - (Z * Standard Deviation / sqrt(n))

In this case, we want to include roughly 95.5 percent of the sample means, which corresponds to a two-sided confidence level of 0.955. To find the appropriate Z-value for this confidence level, we can refer to the standard normal distribution table or use a calculator.

For a two-sided confidence level of 0.955, the Z-value is approximately 1.96.

Given:

Mean = 2.0 litres

Standard Deviation = 0.01 litres

Sample size (n) = 5

Using the formula, we can calculate the upper and lower control limits:

UCL = 2.0 + (1.96 * 0.01 / sqrt(5))

LCL = 2.0 - (1.96 * 0.01 / sqrt(5))

Calculating the values:

UCL ≈ 2.0018 litres

LCL ≈ 1.9982 litres

Therefore, the upper control limit (UCL) is approximately 2.0018 litres, and the lower control limit (LCL) is approximately 1.9982 litres, which would include roughly 95.5 percent of the sample means.

Now let's check if the process is in control using the given sample means:

Mean of the sample means = (2.005 + 2.001 + 1.998 + 2.002 + 1.995 + 1.999) / 6 ≈ 1.9997

Since the mean of the sample means falls within the control limits (between UCL and LCL), we can conclude that the process is in control.

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Alice,barbra, and carol are sisters. alice is 3 years younger then barbara is 5 years younger then carol. together the sisters are 68 years old. how old is barbara?

Answers

The age of Barbra is 22 years.

What is method of substitution?

The algebraic method for solving simultaneous linear equations is the substitution method. A quantity of one variable through one expression is replaced in the second equation, as the name implies.

Now, according to the question.

Let 'a' be the age of Alice.

Let 'b' be the age of Barbra

Let 'c' be the age of Carol.

The sum of age of all three sisters is 68 years.

Thus,  a + b + c = 68

Now, as Alice is three years younger than Barbra.

a = b - 3

and, Barbra is 5 years younger than Carol.

b = c - 5

c = b + 5

By substitution of values of a and c in total age.

(b - 3) + b + (b + 5) = 68

3b - 3 + 5 = 68

On solving the expression.

b = 22

Therefore, the age of Barbra is 22 years.

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Alejo records the time it takes
to download a variety of file types. How is the
download time related to the file size? Explain.
The ratios for each pair of data are
so the download time and the file size are

Answers

The ratios for each pair of the data are the same, so the download time and the file size are proportional.

What is a proportional relationship?

A proportional relationship is a linear function that has the following features.

Slope as the constant of proportionality.Intercept of zero.

Hence the output variable y is given by the multiplication of the input variable x and the constant of proportionality k, hence the equation is:

y = kx.

A set of data is only proportional if the division of the output by the input is the same for all pairs of values.

For this set of data, this division is given as follows:

1.25/25 = 0.05 MB/s.3.6/72 = 0.05 MB/s.6.25/125 = 0.05 MB/s.

Same ratios, hence the measures are proportional.

Missing Information

The data is given by the image at the end of the answer.

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Alejo records the time it takesto download a variety of file types. How is thedownload time related to
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