Given the following code
namespace globalType
{
void printResult();
}
which of the following statements is needed to access printResult?
a. globalType.printResult(): b. globalType:: printResult: c. globalType.printResults(): d. globalType: printResult():

Answers

Answer 1

Statements of the form globalType::printResult(); are required to access printResult.

Which of the following claims is used to make accessing all members of the globalType namespace easier?

The output of the statement cout str.* and & are the operators used in pointers when namespace globalType is used and string str = "Gone with the wind" is taken into consideration. In contrast to "&," which provides the address of the variable, * provides the value that is stored at a specific address.

Which syntax should be used when calling static member functions with the class name?

Using the class name to access the static member functions requires the scope resolution operator. It is clear from this that the function belongs in the relevant class.

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Related Questions

Answer the multiple-choice questions. A. Illuminance is affected by a) Distance. b) Flux. c) Area. d) All of the above. B. The unit of efficacy is a) Lumen/Watts. C. b) Output lumen/Input lumen. c) Lux/Watts. d) None of the above. Luminous intensity can be calculated from a) flux/Area. b) flux/Steradian. c) flux/power. d) None of the above.

Answers

A)  d) All of the above. B) The unit of efficacy is a) Lumen/Watts. and C) The luminous intensity is b) flux/Steradian.

Illuminance is the measure of the amount of light that falls on a surface per unit area. It is affected by distance, flux, and area. Distance plays a role in illuminance because the further away a light source is, the less illuminance it will produce on a surface. Flux, which is the total amount of light emitted by a source, also affects illuminance because the more flux a source produces, the more illuminance it will generate. Finally, area is a factor in illuminance because the larger the surface area that the light falls on, the lower the illuminance will be.
B. The correct answer to the multiple-choice question about the unit of efficacy is a) Lumen/Watts. Efficacy is the measure of how efficient a light source is at producing visible light. It is calculated by dividing the total amount of light output (in lumens) by the power consumed (in watts). Therefore, the unit of efficacy is lumen/watt.
C. The correct answer to the multiple-choice question about calculating luminous intensity is b) flux/Steradian. Luminous intensity is the measure of the amount of light emitted in a particular direction. It is calculated by dividing the flux (total amount of light emitted by the source) by the solid angle in which the light is emitted (measured in steradians). Therefore, the formula for calculating luminous intensity is flux/steradian.

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for flow over a flat plate of length l, the local heat transfer coefficient hx is known to vary as x1/2, where x is the distance from the leading edge of the plate. what is the ratio of the average nusselt number for the entire plate ( nu l) to the local nusselt number at x l (nul)?

Answers

The Nusselt number is a dimensionless number that relates the heat transfer between a fluid and a surface to the thermal conductivity and the fluid properties. For flow over a flat plate of length l, the local heat transfer coefficient hx is known to vary as x1/2, where x is the distance from the leading edge of the plate.

The local Nusselt number at a distance x from the leading edge of the plate can be calculated as:

nul = hx * x / k

where k is the thermal conductivity of the fluid.

The average Nusselt number for the entire plate can be calculated as:

nu l = (1/l) * ∫₀^l hx(x) * x / k dx

where hx(x) is the local heat transfer coefficient at a distance x from the leading edge of the plate.

Since hx is known to vary as x1/2, we can write:

hx(x) = k * (hx(l) / l^(1/2)) * x^(1/2)

Substituting this into the equation for nu l and solving the integral, we get:

nu l = 0.664 * (hx(l) * l / k)^(1/2)

Similarly, substituting hx(x) into the equation for nul and simplifying, we get:

nul = 2/3 * hx(l) * (x/l)^(1/2)

Therefore, the ratio of the average Nusselt number for the entire plate to the local Nusselt number at x l is:

nu l / nul = (0.664 * (hx(l) * l / k)^(1/2)) / (2/3 * hx(l) * (l/l)^(1/2))

Simplifying, we get:

nu l / nul = 0.998

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Select the best answer for the question
12. The measurement 11/16 inch is closest to but just slightly longer than which of the following
O A. 9/16 inch
B. 4 inch
O C.7 inch
OD. 5/8 inch

Answers

Answer:

O A. 9/16 inch

Explanation:

Where can you go to find the system requirements?

A. Instructor Contact Center
B. Library
C. Help Center
D. None of these.

Answers

Then  you go to find the system requirements are the D. None of these as none of it dictates about the  find the system requirements hen needed.

What is person requirement and device requirement?

User necessities describe what the person ought to do . System necessities describe how will the person acquire person necessities while interacting with the device plus nonpurposeful necessities such as "the device ought to cope with one hundred thousand customers on the identical time". So: User requirement : The person ought to see their check results.Where is device necessities.

For packaged products, device necessities are regularly imprinted on the packaging. For downloadable products, the device necessities are regularly indicated at the download page. System necessities may be widely categorized as purposeful necessities, records necessities, pleasant necessities and constraints.

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3) largest cluster of ones. assume in figures h7p3 we need to count the largest group of consecutive ones (instead of leading ones that we did in hw6, p3). for example if x

Answers

We must first transform the documents into numerical features in order to work with text data.

We will employ sparse matrices for the remaining tasks in the assignment. A sparse matrix is one that only contains a few nonzero entries. To reduce space and speed up calculation, a useful data structure for sparse matrices would only keep the nonzero values. A sparse matrix library that is well efficient is included in SciPy. For SciPy sparse matrices, many matrix function that are accessible for NumPy arrays are also available.

Dictionary format is first converted to the SciPy sparse matrix format. You can skip the next block and treat the function as a black box if you'd like, but we provided plenty of comments for those who are interested.

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Consider an array based circular queue is capable of holding 8 elements from index \( 0-7 \). If the following operations are performed on the empty circular queue what will be the element at index 0

Answers

The circular queue is a variation of a regular queue data structure.

In a circular queue, the last element of the queue points to the first element of the queue, forming a circle. In this way, both front and rear of the queue can be treated as circular.

The array-based circular queue is a data structure that operates as a circular queue using an array as the storage medium.

It has the following operations:

Enqueue:

adds an element to the queue.
Dequeue:

removes an element from the queue.
Peek:

retrieves the element at the front of the queue without removing it.
Is Empty:

checks whether the queue is empty.
Is Full:

checks whether the queue is full.

Consider an array-based circular queue that can hold eight elements from index 0-7.

To find the element at index 0, we will perform the following operations:

Initially, the queue is empty.

We can add an element to the queue using the Enqueue operation.

The element 5 is now at the front of the queue, which is also at index 0.

Next, let's add two more elements to the queue using Enqueue operation.

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An adiabatic piston-cylinder compressor has an efficiency of 85%. If air is compressed from 101 kPa and 25 o C to 1200 kPa. Determine the actual work done and the actual final temperature. g

Answers

Answer:

\(T_2=604.70K=331.55\°C\)

\(W=220.10\frac{J}{g}\)

Explanation:

Hello!

In this case, for this compression of air from 101 kPa to 1200 kPa, we should first realize that equation relating P and T is:

\(T_1*P_1^{\frac{1-\gamma}{\gamma} }=T_2*P_2^{\frac{1-\gamma}{\gamma} }\)

Whereas:

\(\gamma=\frac{Cp_{air}}{Cv_{air}} =\frac{1.00J/(g\°C)}{0.718J/(g\°C)}=1.40\)

That is why the final temperature is:

\(T_2=T_1(\frac{P_1}{P_2})^{\frac{1-\gamma}{\gamma} }\\\\T_2=298.15K(\frac{101kPa}{1200kPa})^{\frac{1-1.40}{1.40} }\\\\T_2=604.70K=331.55\°C\)

Moreover, for the work done, since the process is adiabatic, no heat is in the equation:

\(Q-W=\Delta U\)

But as the work is done on the system we can write:

\(-(-W)=\Delta U=Cv(T_2-T_1)\\\\W=0.718\frac{J}{g*K}(604.70K-298.15K)\\ \\W=220.10\frac{J}{g}\)

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The variation of temperature in a plane wall is determined to be T(x)=52x+25 where x is in m and T is in ∘C. If the temperature atone surface is 38 ∘ C, the thickness of the wall is

(a) 0. 10 m

b) 0. 20 m

(c) 0. 25 m

(d) 0. 40 m

(e) 0. 50m

Answers

The constant deceleration of the car is  0.25 m. The correct answer is (c)0. 25 m

The thickness of the wall can be found by rearranging the equation T(x) = 52x + 25 to solve for x, and then plugging in the given temperature at one surface.

1. Rearrange the equation to solve for x:

T(x) = 52x + 25

T(x) - 25 = 52x

(T(x) - 25)/52 = x

2. Plug in the given temperature at one surface (38°C) for T(x):

(38 - 25)/52 = x

13/52 = x

3. Simplify the fraction to get the thickness of the wall:

x = 0.25 m

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Using Raoult’s law, estimate the boiling temperature and mole fractions in the vapor phase that is in equilibrium with a liquid having 0.2608 mol fraction of ethanol, in a mixture ethanol/water at P = 1 atm.
If possible, solve non-numerically.

Answers

Answer:

\(T=92.16 \°C\)

\(y_{et}=0.433\\\\y_w=0.567\)

Explanation:

Hello,

In this case, the Raoult's law for this problem is:

\(y_{et}P=x_{et}P_{et}^{sat}\\\\y_{w}P=x_{w}P_{w}^{sat}\)

Which can be written as:

\(P=x_{et}P_{et}^{sat}+x_{w}P_{w}^{sat}\)

Thus, by using the Antoine equation, we can symbolically represent the the temperature at which such mixture boil:

\(1atm=0.2608*10^{(8.13484-\frac{ 1662.48}{238.131+T})}/760+0.7392*10^{(5.40221-\frac{1838.675}{-31.737+T-273.15})}/1.01325\)

The solution, by numerical iteration process (there is not way to solve it analytically) is 92.16 °C considering the data extracted from NIST database. Next, vapor fractions are:

\(y_{et}=x_{et}*10^{(8.13484-\frac{ 1662.48}{238.131+T})}/760/P\\\\y_{et}=0.2608*10^{(8.13484-\frac{ 1662.48}{238.131+92.16})}/760/1atm\\\\y_{et}=0.433\\\\y_w=1-y_{et}=1-0.433\\\\y_w=0.567\)

Regards.

A pinion and gear pair is used to transmit a power of 5000 W. The teeth numbers of pinion
and gear are 20 and 50. The module is 5 mm, the pressure angle is 20o
and the face width is 45 mm. The
rotational speed of pinion is 300 rev/min. Both the pinion and the gear material are Nitralloy 135 Grade2 with a hardness of 277 Brinell. The quality standard number Qv is 5 and installation is open gearing
quality. Find the AGMA bending and contact stresses and the corresponding factors of safety for a
pinion life of 109
cycles and a reliability of 0.98

A pinion and gear pair is used to transmit a power of 5000 W. The teeth numbers of pinion and gear are

Answers

Answer:

mark me as a brainleast

Explanation:

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La iluminación de la superficie de un patio amplio es 1600 lx cuando el ángulo de elevación del sol 53°. Calcular la iluminación cuando el ángulo de elevación del Sol sea 37°

Answers

Answer:

 I = 1205.69 Lx

Explanation:

The irradiation or intensity of the solar radiation on the earth is maximum for the vertical fire, with a value I₀

          I = I₀ sin θ

in this case with the initial data we can calculate the initial irradiance

         I₀ = \(\frac{I}{sin \ \theta }\)

         I₀ = 1600 /sin 53

         I₀ = 2003.42 lx

for when the angle is θ = 37º

         I = 2003.42 sin 37

         I = 1205.69 Lx

a designer requires a shunt regulator of approximately 20 v. two kinds of zener diodes are available: 6.8-v devices with r, of 100 and 5.1 -v devices with r, of 25 n. for the two major choices possible, find the load regulation. in this calculation neglect the effect of the regulator resistance r.

Answers

The load choices that are available in the question are:

three 6.8v zeners that would give 3 x  6.8-20 volts. This has the resistance of 30 ohms.The four 5.1 V zeners that would provide 4 x 5.1 20.4 volts. The resistance would be 100.

How to determine the load choices

a. The 6.8 Zener diode

what is required would be 3 zener diodes. These would be able to provide 3 x 6.8 = 20. 4 output

The resistance would be 3 x 10 ohms = 30 Ohms.

b. For the 5.1 v zener diode

The requirement here would be 4 zener diodes. This would have to provide 4 x 5.1 = 20.4 volts of output.

The resistance that it would have to give would be 4 x 25 = 100 ohms of resistance.

Therefore from the calculations that we have above we would have to conclude that the load regulation that is here without R would be

30 ohms for the case of a , while it would have to be 100 ohms for the case of b.

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All of these are part of the seat belt assembly EXCEPT the:
O latch plate
O D-ring
O retractor.
O cushion

Answers

Answer: Cushion
Explanation: All parts going together to form a seat belt except the cushion
The answer is the last one: cushion

A relational database consists of a collection of
a. Tables
b. Fields
c. Records
d. Keys

Answers

A relational database consists of a collection of tables.


About relational database:

In a relational database, data is organized into tables, which consist of rows and columns. These tables are related to each other through keys, allowing for efficient data retrieval and manipulation.

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A 40 HP motor with a load factor of 75% and an efficiency of 89.3% will be replaced with a 30 HP motor with a load factor of 100% and an efficiency of 93.6%. How many kW of power savings will be obtained from this project?​

Answers

First, we need to calculate the actual power consumption of the 40 HP motor with a load factor of 75% and an efficiency of 89.3%.

Actual power consumption = Rated power x Load factor / Efficiency

= 40 HP x 0.75 / 0.893

= 33.6 kW

Next, we need to calculate the actual power consumption of the 30 HP motor with a load factor of 100% and an efficiency of 93.6%.

Actual power consumption = Rated power x Load factor / Efficiency

= 30 HP x 1 / 0.936

= 31.9 kW

The power savings from this project can be calculated as the difference between the actual power consumption of the 40 HP motor and the actual power consumption of the 30 HP motor.

Power savings = Actual power consumption of 40 HP motor - Actual power consumption of 30 HP motor

= 33.6 kW - 31.9 kW

= 1.7 kW

Therefore, the project will result in a power savings of 1.7 kW.

Tech A says that multi-plate clutches must have a specified amount of clearance when they are installed. Tech B says that there should be no clearance when they are installed because the clutch would slip. Who is correct?

Answers

The person who is correct based on the assertions made about the multi-plate clutch is:

Technician A

Multi-plate Clutch

This refers to the machinery which makes use of plates so that there would be efficient transmission between the engine shaft and the transmission shaft.

WIth this in mind, we can see that they must have specific amount of clearance when they are installed so that they can effectively function in the automobile.

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which of the following descriptions apply to standard-type motorcycles? a. are best for long-distance touring b. a lot of performance-oriented bodywork c. straight-up seating position d. designed solely for off-highway use

Answers

The correct response is c. straight-up seating position. Standard-type motorcycles apply to straight-up seating position.

Keeping the feet flat while seated or placing them on the ground or a footrest. Do not cross your ankles or knees. keeping a modest distance between the chair and the back of the knees. putting the knees at the same height as the hips or just a little lower. Sit upright with your shoulders back and your back straight. When sitting, try to leave two inches between the back of your knees and the edge of the seat. Puleio advises adjusting your seat so that your thighs are parallel to the floor and your feet are flat on the ground (or on a footrest if your feet cannot rest comfortably).

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The gear with the least number of teeth is called the

Answers

Its called the Spur gear

How many watts are consumed in a circuit having a power factor of 0. 2 if the input is 100 vac at 4 amperes?.

Answers

The watts that are consumed is 80 watts.

What power factor?

The term power factor has to do with the measure of the efficiency of the use of energy. Recall that power is defined as the rate of doing work. The magnitude of the power factor shows the extent to which the power is used.

Now, to obtain the watts are consumed in a circuit having a power factor of 0. 2 if the input is 100 vac at 4 amperes we have;  V × I × PF = 100V × 4A × 0.2 = 80 watts.

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Grizzly bears in captivity frequently display abnormal behaviors, such as repetitive pacing, swaying from side-to-side, and biting the bars of their enclosure. In order to improve animal welfare, zoos and parks need to stimulate their captive bears to behave as closely as possible to their wild counterparts. Bear sanctuaries are an ideal place where grizzly bears can live out their lives in an enriched and safe environment that is as close their natural habitat as possible. Which of the following statements best expresses the main conclusion of the above argument?

Grizzly bears in captivity frequently display abnormal behaviors, such as repetitive pacing, swaying

Answers

Note that where Grizzly bears in captivity frequently display abnormal behaviors, such as repetitive pacing, swaying from side to side, and biting the bars of their enclosure, the statement that  best expresses the main conclusion of the above argument is: "Bears need to be in an environment as close as possible to their natural habitat." (Option 2)

What is the rationale for the above response?

Grizzly bears in captivity exhibit abnormal behaviors, which is a sign of poor animal welfare.

To improve their welfare, they need to be in an environment as close as possible to their natural habitat. Bear sanctuaries provide an ideal solution by providing an enriched and safe environment for the bears, mimicking their natural habitat. This helps to reduce abnormal behaviors and improve their overall quality of life.

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6. 35 One lb of water contained in a piston-oylinder ussembly,


initially saturated vapor at 1 atm, is condensed at constant


pressure to saturated liquid. Evaluate the heat transfer, in


Biu, and the entropy production, in Btus'r, for


(a) the water as the system,


(b) an enlarged system consisting of the water and enough


of the nearby surroundings that heat transfer occurs only at


the ambient temperature, 80 F.


Assume the state of the nearby surroundings does not


change during the process of the water, and ignore kinetic


and potential energy

Answers

The heat transfer for (a) water as the system is 165.79 Btu and the entropy production is 0.4855 Btu/R for both (a) and (b) systems.The heat transfer and entropy production are the same as for (a) the water as the system.

To evaluate the heat transfer and entropy production for the given system, we can use the energy and entropy equations.

(a) For the water as the system:

Heat transfer (Q) is the enthalpy change from initial state to final state.

Entropy production (ΔS) is the change in entropy of the system.

Since the water is condensed at constant pressure, the enthalpy change is equal to the heat transfer:

Q

To evaluate the entropy production, we can use the entropy balance equation:

ΔS = m * (s_f - s_i) - Q / T

where m is the mass of water and T is the temperature at which heat transfer occurs.

(b) For the enlarged system:

In this case, the heat transfer occurs only at the ambient temperature, so the heat transfer is given by:

Q = m * Cp * (T_f - T_i)

The entropy production can be evaluated using the entropy balance equation as before:

ΔS = m * (s_f - s_i) - Q / T

where m is the mass of water, Cp is the specific heat capacity, and T is the ambient temperature.

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which variable in an experiment is manipulated by the researcher

Answers

In an experiment, the variable that is manipulated by the researcher is called the independent variable.

The independent variable is the factor or condition that the researcher deliberately changes or controls to observe its effect on the dependent variable. The independent variable is often denoted as "X" and is the presumed cause or predictor variable in the experiment. The researcher selects the values or levels of the independent variable and manipulates it systematically across different experimental conditions or groups.

For example, in a study investigating the effect of different fertilizer types on plant growth, the researcher may manipulate the independent variable, which is the type of fertilizer applied to the plants. The researcher may have different groups of plants, each receiving a different fertilizer type (e.g., Group A: Fertilizer X, Group B: Fertilizer Y, etc.). By manipulating the independent variable, the researcher can observe and measure how the different fertilizer types impact the dependent variable, which in this case would be the plant growth.

It is important to carefully control and manipulate the independent variable to ensure that any observed effects on the dependent variable can be attributed to the changes in the independent variable rather than other factors. This allows researchers to establish cause-and-effect relationships and draw valid conclusions from their experiments.

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Would you expect the correlation between High School GPA and College GPA to be higher when taken from your entire high school class or when taken from only the top 20 students? Why?

Answers

Answer:

Even though it has been found that there is a correlation between the specific high school a student attends and their college graduation rate, there is a much stronger correlation between a student's high school GPA, regardless of what high school they attended, and that student completing college.

Explanation:

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The Specific weight of an unknown liquid is 12400N/m³. What mass of the liquid is contained in a volume of 500 cm³ ? use; (a) The Standard value of gravity. (6) The minimum value of gravity on the earth (c) The maximum value of gravity on the earth​

Answers

The mass of the liquid is 61.029 N. The mass of the liquid is 60.636 N in the second scenario.

What is density?

The density of a solid, liquid, or gas describes how closely packed the particles are. Density is defined as the amount of mass per unit volume.

The mass of a liquid can be calculated using its volume and density. The formula is:

mass = density x volume

We are given the density of the unknown liquid as 12400 N/m³ and the volume as 500 cm³.

We need to convert the volume from cm³ to m³ before we can use the formula:

500 cm³ = 0.0005 m³

(a) Using the standard value of gravity (9.81 m/s²):

mass = density x volume x gravity

= 12400 N/m³ x 0.0005 m³ x 9.81 m/s²

= 61.029 N

Therefore, the mass of the liquid is 61.029 N.

(b) Using the minimum value of gravity on Earth (9.78 m/s²):

mass = density x volume x gravity

= 12400 N/m³ x 0.0005 m³ x 9.78 m/s²

= 60.636 N

Therefore, the mass of the liquid is 60.636 N.

(c) Using the maximum value of gravity on Earth (9.83 m/s²):

mass = density x volume x gravity

= 12400 N/m³ x 0.0005 m³ x 9.83 m/s²

= 61.422 N

Thus, the mass of the liquid is 61.422 N.

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Intermodal transportation got its start with what transportation innovation developed in the 1950s? A. the pallet
B. the corrugated box
C. the drum
D. the container
E. the forklift

Answers

Intermodal transportation got its start with the transportation innovation of the container in the 1950s.

This standardization of shipping containers allowed for seamless transfer between different modes of transportation, such as trucks, trains, and ships, without the need for unpacking and repacking cargo. The containerization of goods also increased efficiency and reduced costs, making it a popular choice for shipping companies. Today, intermodal transportation remains a vital part of the global supply chain, with containers being the most common mode of transport for goods worldwide.

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mr. yoda is a network engineer who has been working on setting up a data delivery service. while creating the tcp segment for this purpose, the network administrator has requested mr. yoda to set up a command requesting a synchronization of the sequence numbers between two nodes so that it can indicate to the receiving node that there is no payload attached to the data packet. analyze which of the following statements will best fit the situation for mr. yoda.

Answers

A console application called IPconfig is used to display information about TCP/IP settings as well as information about DNS and DHCP (Dynamic Host Configuration Protocol).

Both IPv4 and IPv6 networks use IPsec to authenticate and encrypt data packets. A packet's IP header contains IPsec protocol headers, which specify how a packet's contents are handled, including how it is delivered across a network and routed. Email messages are transmitted over the Internet using the Simple Mail Transfer Protocol (SMTP). Most email clients use this protocol to send messages to the server, and servers also use it to forward messages to their intended recipients.

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David wishes to accumulate $1million by the of 20 years by making equal anual end of year deposits over the next 20 years if david can earn 10%on his envestment how much he deposit at the end of each year

Answers

Answer:

Explanation:

We can use the formula for calculating the future value of an annuity to determine the amount that David needs to deposit each year. The formula is:

A = F / ( (1 + r)^n - 1) / r

where:

A is the annual deposit

F is the future value ($1 million)

r is the interest rate (10%)

n is the number of years (20)

Plugging in the values, we get:

A = 1000000 / ( (1 + 0.1)^20 - 1) / 0.1

A = $38,851.68

Therefore, David needs to deposit $38,851.68 at the end of each year for 20 years to accumulate $1 million.

the cab is tasked with reviewing and prioritizing requested changes, monitoring the change process, and providing managerial feedback. true or false

Answers

The statement "the CAB is tasked with reviewing and prioritizing requested changes, monitoring the change process, and providing managerial feedback" is true.

What does Change Advisory Board (CAB) means?


Change Advisory Board (CAB) is a group of people responsible for evaluating, authorizing, and overseeing changes to IT systems and services within an organization. The CAB is typically composed of representatives from different departments or functions within the organization, such as IT, security, operations, and business units. The purpose of the CAB is to ensure that changes are made in a controlled and coordinated manner, with proper consideration given to the potential impact on the business, IT operations, and security.


The Change Advisory Board (CAB) plays a crucial role in the change management process by evaluating proposed changes, prioritizing them, overseeing the implementation, and offering valuable feedback to ensure continuous improvement.

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Explain what the ancient Romans did to solve the problem in the following scenario.

Situation: In ancient Italy, farmers were experiencing a drought. Rather than move to where the water was, Roman inventors decided to bring the water to the farmers.

Answers

Answer:

They moved fresh water around their vast empire with aqueducts and canals.

Explanation:

(1) Complete E/R diagram from Phase 1 (25 points) On you E/R diagram, clearly describe each entity (including, list of entity attributes, and the primary key), and each relationship with its multiplicities. (2) Relational Model (25 points) Using the method for translating an E/R diagram to relations, produce a set of tables for your database design For each table, specify the attributes, their domains, required data constraints, default values, primary key, candidate keys, foreign keys and the tables which the foreign keys are referencing (everything you need for a CREATE TABLE statement) (3) Complete Database Functionalities and User Interface (40 points) (a) List all actors (i.e. users) of your database (b) For each actor, list all use-cases including all the steps. For each entity, you must have use cases that perform at least one aggregate query, one insert operation, one delete operation, and one update operation; For each relationship, you must have use cases that perform at least one joint query. (Number your use cases. That's a minimum of 34 use cases for 7 entities, and 44 use cases for 9 entities) (c) Use Case Realization: Explain how the relations and relationships are used in EACH of the use cases. Provide the complete relational algebra or SQL statements for every use case. (4) Project Time Table (10 points) (a) List major tasks to a be completed (b) For each task, indicate team member responsible for competing task, and planned completion dates.

Answers

Entities, attributes, and relationships are the three main building blocks of E/R diagrams or ERDs. Entities are usually represented by a rectangle and can be objects, people, concepts, or events that contain data.

For more than 35 years, there has been an entity relationship (ER) data model. Because it is rather abstract and simple to describe and explain, it is a good fit for data modelling for usage with databases. Relationship models may be easily converted to relations. ER diagrams serve as a visual representation of ER models, also known as ER schemas. The foundation of the database is comprised on autonomous objects, often known as kernels. They serve as the foundation for additional tables. The meaning of dependent entities, also known as derived entities, is derived from other tables. Additional details about one table are provided by characteristic entities. Each attribute has a name, a domain of allowed values, and an association with an entity. The ERD does not, however, display the attribute domain information.

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