After a weekend of lucrative gigs, a singer finds herself with an extra $1,500. She currently has $4350 of credit card debt, on which she is charged an annual yield of 24%. Putting $1,500 toward this

After a weekend of lucrative gigs, a singer finds herself with an extra $1,500. She currently has $4350 of credit card debt, on which she is charged an annual yield of 24%. Putting $1,500 toward this would cut that debt to $1,850. Calculate the annual rate of return if she does this. Round, if necessary, to the nearest 0.1%. 

Each week an album sells 6% fewer copies than it did the previous week. This week it sold 13,400 copies. At this rate, in how many weeks will it sell fewer than 2,000 copies? Round your answer up to the nearest week.