Answer:
Select SUM(HOURS), SUM(CHARGES) from employees
Explanation:
The table structure is not given. So, I will assume that the table name is "employees", the columns to retrieve are "hours" and "charges"
Having said that, the function to retrieve the total of column is the sum() function.
So, the query is as follows:
Select ----> This means that the query is to retrieve from the table
SUM(HOURS), SUM(CHARGES) --- This represent the records to retrieve
from employees ---- This represents the table to retrieve from.
Answer:
The answer is "Phreaker".
Explanation:
A "Phreak" is one who secretly hacks into another telephone network, it is usually to make individual long-distance calling or to access the telephone lines.
- Sometimes, it involves anyone, who breaches or wants to break any information security.
- It is used to receive unlimited calls and texts or high-cost contact details, that's why the Phreaker is the correct answer.
Answer:
D. Chain and Sprockets
Explanation:
Chains and sprockets are power transmission tools. The roller chain is connected to a toothed wheel which is the sprocket. The combination provides mechanical power to the wheels of vehicles.
An advantage they possess is their ability to transmit mechanical power over both short and long distances. They have a high degree of efficiency but they require constant lubrication. They also produce noise during operation.
Sepa la verga cx I don't even know this
Answer:
True
Explanation:
If you leave the device on while cleaning, you risk electrocution.