A new website dedicated to helping users research their ancestry had 200 visitors in its first week. The marketing director believes that a successful advertising campaign will increase the number of visitors by 50% each week. Find the function for f(n), the number of weekly visitors after n weeks of the advertising campaign. (Let n = 0 for the first week.)

1. according to the internal revenue service, the mean tax refund for the year 2007 was $2,708. assume the standard deviation is $650 and that the amounts refunded follow a normal probability distribution. a. what percent of the refunds are more than $3,000? b. what percent of the refunds are more than $3,000 but less than $4,000? c. what percent of the refunds are less than $2,000?