How much tip would you leave the server if your bill was $48.43 and you wanted to tip the server 15%? ASAP besties

Do u just plot the numbers on the graph like (1,

Cynthia takes her dog to the park every 2 days. she bathes her dog every 7 days. if she took her dog to the park and bathed him today, how long will it be until she does both on the same day again?

F(x) = (x^2 + 3x − 4) and g (x) = (x+4) find f/g and state the domain.