Shane wants to figure out what grade he is getting in math. his test scores were 85.6 ,78.5 ,92.5 ,67 and 83.7. what was his average test score? what grade will he receive?

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.