Thank you for your help

How to find the exponential function y=ca^x, with points (1,2) and (2,1)

Ian is in training for a national hot dog eating contest on the 4th of july. on his first day of training, he eats 4 hot dogs. each day, he plans to eat 110% of the number of hot dogs he ate the previous day. write an explicit formula that could be used to find the number of hot dogs ian will eat on any particular day.

Which spreadsheet would be used to compute the first nine terms of the geometric sequence a^n=32•(1/2)n-1