Tom is buying his calculator for math class. The calculator costs $13.99 Before tax at staples. Toms mom has a 15% coupon for staples. Also, he will have to pay tax of 8.25%. What is the total Tom will need to pay after coupon and tax

The customer price index(cpi), which measures the cost of a typical package of customer goods,was 208.8 in 2011 and 244.1 in 2016.let x=11 corresponding to the year 2011 an estimate to cpi into 2013 and 2014. assume that the data can be modeled by a straight line and the trend to continue idenfinitely.use data points to find such a line and then estimate the requested quantities