Solve 15/k when k=3 please

Which logarithmic equation is equivalent to the exponential equation below? e^a=55(you will receive 34 points)

Plz need answer now will mark which situations represent linear functions? check all that apply. a)the temperature rises and falls over the course of a day. temperature is a function of time. b)a baseball is hit into the outfield. the height of the ball is a function of time. c)a car goes 55 mph on the highway. distance is a function of time. d)a child grew 2 inches this year and 1 inch last year. height is a function of time. e)a movie director makes 2 movies per year. the number of movies is a function of the years.

An 18% discount on a watch saved a shopper $72. find the price of the watch before the discount