Bo has $12,700 in his savings account. If it earns 3.15% interest every month. How much money does Bo have in his bank account after 6 months?

6. sarah saved $12.75 every week for a number of weeks, w. she received an additional $25 during the last week in which she saved money. write and solve an equation to find the number of weeks, w, for which sarah had saved money if she has $114.25 now.