A.intended to gather information.
that asks a question or asks for information
A. intended to gather information.
A letter of inquiry is typically a formal letter requesting information or clarification on a specific topic. It can be used in various contexts, including job applications, business inquiries, or seeking more details about a particular subject. The purpose of the letter is to gather information or express interest in a specific matter.
Valediction
A number before a variable (letter) is called the coefficient of the variable. Both of them makes a term, or a monomial.
An air letter is another term for an aerogram - a letter sent by air mail.
POLYSACCHARIDE
exponent
the variable
the variable
That is called a variable.
Usually the letter h represents height.