Need help with 20 trig problems if answered correctly I will pay you.

For how answer my question this will be the last question can you answer in math subject

Ifurniture stores having a weekend sale and is offering 20% discount on patio chairs and table the sales tax on furniture is 6.25 using function composition how can you represent the total amount a that you would need to pay for this furniture that cost x dollars

How do you convert 1.27 to a percentage