Find the 7th term of the geometric sequence whose common ratio is 1/3 and whose first term is 3

What are the measures of ∠a, ∠b, ∠c and ∠d? explain how to find each of the angle measure.

What percent of 18 is 24? and plz explain thx.

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