Amovie earned $40 million in its first week of release. earnings decreased each successive week by 40%. which recursive formula can you use to find out how much money (in millions) the movie earned n weeks after its release?

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle. he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field