What is the average rate of change of the function f(x) =4(0.8)x over the interval 1 less than or equal to x and less than or equal to 3

Logan wants to know how many skateboards have defective parts. he inspects 20,000 skateboards and keeps track of the number of defects per board. use his probability distribution table to find the expected value for defects on a skateboard.

Which function has the domain x> -11

Use sigma notation to represent the following series for 9 terms.