6. Is this a relation? Is this a function? Why or why not?

Abbey purchased a house using a fixed rate mortgage. the annual interest rate is 4.2% compounded monthly for 20 years. the mortgage amount is $235,000. what is the monthly payment on the mortgage? this isn't a multiple choice question have to show my work

One card is dealt from a 52 card deck. find the probability that the dealt card is a 4 or a black 7

You are at a restaurant and owe $56.20 for your meal. you want to leave an 18% tip. approximately how much is your tip?