Hat are three machines or devices that depend on gravity to work?

Business customers pay $0.006 per gallon for the first 8000 gallons. If the usage is more than 8000 gallons, the rate will be $0

trasher [3.6K]

Answer:

#include <bits/stdc++.h>

using namespace std;

int main()

{

// variables

char cust_t;

int no_gallon;

double cost=0;

cout<<"Enter the type of customer(B for business or R for residential):";

// read the type of customer

cin>>cust_t;

// if type is business

if(cust_t=='b'||cust_t=='B')

{

cout<<"please enter the number of gallons:";

// read the number of gallons

cin>>no_gallon;

// if number of gallons are less or equal to 8000

if(no_gallon<=8000)

{

// calculate cost

cost=no_gallon*0.006;

cout<<"total cost is: $"<<cost<<endl;

}

else

{

// if number of gallons is greater than 8000

// calculate cost

cost=(8000*0.006)+((no_gallon-8000)*0.008);

cout<<"total cost is: $"<<cost<<endl;

}

// if customer type is residential

else if(cust_t=='r'||cust_t=='R')

{

cout<<"please enter the number of gallons:";

// read the number of gallons

cin>>no_gallon;

// if number of gallons are less or equal to 8000

if(no_gallon<=8000)

{

// calculate cost

cost=no_gallon*0.007;

cout<<"total cost is: $"<<cost<<endl;

}

else

{// if number of gallons is greater than 8000

// calculate cost

cost=(8000*0.005)+((no_gallon-8000)*0.007);

cout<<"total cost is: $"<<cost<<endl;

}

return 0;

}

Explanation:

Ask user to enter the type of customer and assign it to variable "cust_t". If the customer type is business then read the number of gallons from user and assign it to variable "no_gallon". Then calculate cost of gallons, if gallons are less or equal to 800 then multiply it with 0.006.And if gallons are greater than 8000, cost for first 8000 will be multiply by 0.006 and for rest gallons multiply with 0.008.Similarly if customer type is residential then for first 8000 gallons cost will be multiply by 0.005 and for rest it will multiply by 0.007. Then print the cost.

Output:

Enter the type of customer(B for business or R for residential):b

please enter the number of gallons:9000

total cost is: $56

4 0

3 years ago

Software that people commonly use in the workplace to make their lives easier is called?

emmasim [6.3K]

Answer: System Software

7 0

3 years ago

What is a digital pen called<br><br>A digital pen is called a ____

steposvetlana [31]

A digital pen is a battery-operated writing instrument that allows the user to digitally capture a handwritten note or drawing. Typically, a digital pen comes with a Universal Serial Bus (USB) cradle to let the user upload the handwritten notes to a personal computer (PC).

Sometimes called a smart pen or stylus.

4 0

3 years ago

Read 2 more answers

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

If you touch a downed powerline covered or bare, what's the likely outcome

ANEK [815]

you would be shocked, it can even kill you

5 0

3 years ago