Riley is deciding between two cell-phone plans. One plan charges a monthly fee of $9.99 and 5 cents per minute for calls, while the other plan does not have a monthly fee but charges 9.5 cents per minute for calls. The two lines in the graph below constitute an approximate representation of the two plans, where y represents the cost of a plan for a month in which x minutes are used. Based on the graph, approximately how many minutes must Riley use in a month for the cost of the two plans to be the same?