Is It an FYI or a FYI?

It’s an FYI. Because the letter F begins with a vowel sound, we use the article "an".

Is It an FDA-approved or a FDA-approved?

It’s an FDA-approved. The initial letter of the acronym FDA (the F) has a vowel sound (eff). Since the rule for using "a" or "an" is based on pronunciation, not spelling, we use "an".

Is It an FBI Agent or a FBI Agent?

It’s an FBI agent. Because the acronym FBI begins with a vowel sound (the F sounds like "eff"), we use the article "an".

Is It an F or a F?

It’s an F. Since the consonant F begins with a vowel sound (eff), it takes the article "an".

Is It a Hypothesis or an Hypothesis?

It’s a hypothesis. We use "a" before words that start with a consonant sound. Since the first letter of the noun "hypothesis" (the h) is pronounced, we add the article "a".

Is It a Humble or an Humble?

It’s a humble.... Because the word humble begins with a sounded h, it takes the article "a".

Is It a Hotel or an Hotel?

It’s a hotel. Since the word hotel begins with a consonant sound (the "h" is clearly pronounced), we use the article "a".

Is It a Hostess or an Hostess?

It’s a hostess. Since "hostess" begins with a sounded "h", it takes the indefinite article "a".