Pls help me im confused prob more on the way

You will start by doing a bit of research on viewfinders and LCD displays on digital cameras. After you feel that you have an un

Lemur [1.5K]

Answer:

SOMEBODY ANSWER IT

Explanation:

JESUS C

3 0

3 years ago

.All of the following are true with the respect to implicitinvocation except:

katrin2010 [14]

Answer: D) components are instances of abstraction

Explanation:

As, implicit invocation is the process by which it is used by the the software designer for styling the architecture of the software,where the event handling structured are formed in the system. The main aim of the implicit invocation is to separated the conceptual concern for maintaining or improving the ability of the software engineer. It is basically based on the notion of the broadcasting and based on the event driven. The components are the instance of the abstraction which are not used as the components in implicit invocation which are relinquished control the system over the computational performance,this is the major disadvantage of the implicit invocation.

6 0

3 years ago

Snap Me on <br>samxavier.18

Ahat [919]

Answer:no thank you ima goody

Explanation:

7 0

3 years ago

Read 2 more answers

Write a function (named n_pointed_star) to make the turtle draw an n-pointed star. The function should return nothing, and accep

Andreyy89

Answer:

import sys

import turtle

import random

def n_pointed_star(total_points):

if total_points <= 4:

raise ValueError('Not enough total_points')

area = 150

for coprime in range(total_points//2, 1, -1):

if greatest_common_divisor(total_points, coprime) == 1:

start = turtle.position()

for _ in range(total_points):

turtle.forward(area)

turtle.left(360.0 / total_points * coprime)

turtle.setposition(start)

return

def greatest_common_divisor(a, b):

while b != 0:

a, b = b, a % b

return a

turtle.reset()

n_pointed_star(5)

Explanation:

Inside the n_pointed_star function, check whether the total no. of points are less than or equal to 4 and then throw an exception.
Loop through the total_points variable and check whether the result from greatest_common_divisor is equal to 1 or not and then set the starting position of turtle and move it.
Create the greatest_common_divisor which takes two parameters a and b to find the GCD.
Finally reset the turtle and call the n_pointed_star function.

8 0

3 years ago

In this task, you will perform normalization on a crude table so that it could be stored as a relational database.

ryzh [129]

Answer:

Check the explanation

Explanation:

(1.) The functional dependencies based on assumptions are as follows:-

Trip determines which staff was there in the trip, the car used for the trip, the quantity of fuel used in the trip, the fill up time and the total paid of the trip.

Service station refers to its address

Car details consist of the details of license plate, odometer reading and the fuel type used in the car

fuel type and the fill up time will help to determine the cost of the fuel at that time

cost of the fuel and the quantity of fuel used will determine the total paid

From the above assumptions the functional dependencies are as follows:-

Trip ID -> Staff Name, Car Details, Service Station, Quantity, Fill Up Time, Total Paid

Service Station -> Station Address,

Car Details -> License Plate, Odometer reading, Fuel Type

Fuel Type, Fill up Time -> Cost per litre

Cost per Litre, Quantity -> Total Paid

(2.) Initially the relation is as follows:-

R (Trip ID, Staff Name, Car Details, License Plate, Odometer Reading, Service Station, Station Address, Fill up Time, Fuel type, Quantity, Cost per Litre, Total Paid)

For 1 NF there should not be composite attributes,in the above relation Staff Name and Station Address are composite attributes therefore it will be decomposed as follows:-

R (Trip ID, Staff First Name,Staff Last Name, Car Details, License Plate, Odometer Reading, Service Station, Street, City, State, Zip Code, Fill up Time, Fuel type, Quantity, Cost per Litre, Total Paid)

For 2 NF there should not be partial dependency that is non prime attribute should not dependent upon any 1 prime attribute of candidate key, since in the given relation there is only 1 candidate key which is only Trip ID, therefore the relation is already in 2 NF.

For 3 NF there should not be transitive dependency that is non prime attribute should not dependent upon the other non prime attribute, if it is present then the relation will be decomposed into sub relations, the given relation is not in 3 NF therefore it will be decomposed as follows:-

R1 (Trip ID, Staff First Name, Staff Last Name, Car Details, Service Station, Quantity, Fill up time, Total paid)

R2 (Service Station, Street, City, State, Zip Code)

R3 (Car Details, License Plate, Odometer reading, Fuel Type)

R4 (Fuel Type, Fill up Time, Cost per litre)

R5 (Cost per Litre, Quantity, Total Paid)

(3.) After the 3 NF we add the primary and foreign key constraints as follows:-

R1 (Trip ID, Staff First Name, Staff Last Name, Car Details, Service Station, Quantity, Fill up time, Total paid)

R2 (Service Station, Street, City, State, Zip Code)

R3 (Car Details, License Plate, Odometer reading, Fuel Type)

R4 (Fuel Type, Fill up Time, Cost per litre)

R5 (Cost per Litre, Quantity, Total Paid)

In the above relational schema the primary keys are represented with bold and foreign keys by italic

(4.) The ER diagram of the above relational schema using crow's foot notation are as shown in the attached image below:-

5 0

3 years ago