Tiger wrote a letter to his piano teacher about a new song he had learned. In it, he used the word “cool.” Why might he want to change this to a different word in his letter? The word “cool” to use in a proper letter.

its more of a slang and he need to change it to relax

Explanation:

Explanation:

If Tiger is writing to his piano teacher, the letter should be formal. This means he should only use formal language as they are most likely not close friends. Formal language means no slang or improper english words. The word "cool" is usually considered slang in this context. He could use this word if it was a letter to his close friend but since it is a teacher, he must replace the word with a proper adjective, such as "brilliant" or "amazing" or any other synonyms :)

chloe is the protagonist

the answer is $600    

plz mark brainliest