Ababy elephant weighs 200 pounds at birth. seven years later, the elephant's weight is 3,000 pounds. what is the rate of change of the weight of the elephant?

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?