How much is a 20% tip on a meal that cost $42.50​

When you answer this can you explain

Me complete this proof! prove that a quadrilateral is a square. me with the steps for this proof.

Taylor wants to paint his rectangular deck that is 41 feet long and 24 feet wide. a gallon of paint covers about 350 square feet. how many gallons of paint will taylor need to cover the entire deck? round your answers to two decimal places when necessary.