They are variables. They stand in for different numbers in a problem. for example) a=12
Answer:
Step-by-step explanation:
Given


Required
Determine the Area
Area is calculated as follows

Substitute values for Length and Width

Convert mixed fraction


Hence, the area is
Answer:
3
Step-by-step explanation:
12 / 4 = 3
4 can go into 12 three times, so the fraction 12/4 is equal to 3
Answer:
They let you know the number of numbers there are/will be.
Step-by-step explanation:
Mono, being one, means there will only be one number is the equation.
Bi, being two, means there will be two numbers in the equation.
and tri, being three, means there are three numbers in the equation.
Answer:
The half life of the car is 3.98 years.
Step-by-step explanation:
The value of the car after t years is given by the following equation:

In which V(0) is the initial value and r is the constant decay rate, as a decimal.
The value of a certain car decreases by 16% each year.
This means that 
So



What is the 1⁄2-life of the car?
This is t for which V(t) = 0.5V(0). So







The half life of the car is 3.98 years.