Ernesto has a jump rope that is 10.5 feet long. To make the jump rope the ideal length for his height, Ernesto needs to cut off 0.3 of the jump rope. If Ernesto does this, how much of the jump rope will he cut off? (A) 0.305 foot
(B) 0.315 foot
(C) 3.05 feet
(D) 3.15 feet

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