Regina is beginning a training program to prepare for a race. In week 1, she will run 3 miles in each workout. Each week thereafter, she plans to increase the distance of her runs by 20%. Write an equation to show the number of miles Regina plans to run during her workouts each week. Use the variable "n" to represent the week number.

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.