What is 1/200 as a decimal

What set does not contain -3 the set of all real numbers the set of all integers the set of all whole numbers the set of all rational numbers

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

Me i’m stuck on all these questions besides the two bottom ones