The temperatures in february have varied from as low as -17 degrees to 63 degrees. find the average of these extreme temperatures.
a) 23 degrees
b) -40 degrees
c) 40 degrees
d) -23 degrees
show how you got the answer

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

If i purchase a product for $79.99 and two accessories for 9.99 and 7.00 how much will i owe after taxes applies 8.75%

Hi i’m not sure how to do question 20 if u could explain how to do it that’d b great