HELP ME NDFJINZSJ BEISNMIOGN

What is the 17th term in the arithmetic sequence in which a6 is 101 and a9 is 83

Find the length of the normal and the angle it makes with the positive x-axis. (see pictured below)

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?