The capital Latin letter A is used in math as a variable. In linear algebra it is commonly used to represent a matrix. It also appears in the compound interest formula as the accumulated value.
Symbol  Format  Data 

A  Unicode 

TeX 


SVG 
The compound interest formula calculates the growth of an initial value whos interest compounds over time. The frequency of when the interest is calculated and added to the initial amount can occur continuously,
In math, a matrix is a function that maps between two vector spaces. A matrix can also be thought of as a shorthand way to write a system of linear equations.
The probability of two events is given by the probability of the first event occurring given that the second event has occured multiplied by the probility of the second event occuring.
The latin letter a is used to represent a variable or coefficient.