Kittens weigh about 100 g when born and gain 7 to 15 g per day. if a kitten weighed 100 g at birth and gained 8 grams per day, in how many days will the kitten triple it's weight?

Einstein office equipment has a rental plan for office machines. a fax machine that lists for $722.98 can be rented for 22% of the price annually. the state imposes a usage charge of 3.2%. if stephen hawking travel decides to rent the fax machine, what will its total monthly rental charge be?