The number of books on Tom’s desk went from 12 books to 20 books. Find the percent increase. I need to show work

Write a function that matches the description. a cosine function has a maximum of 5 and a minimum value of -5. f (r) =

Me because some of question i don’t understand

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.