Aschool receives a shipment of books. there are 60 cartons, and each carton weighs 42 pounds. the school's elevator can hold 2200 pounds. what is the greatest number of cartons that can be carried on the elevator at one time if no people ride with them?

Let hh represent the number of hummingbirds and ss represent the number of sunbirds that must pollinate the colony so it can survive until next year. 6h+4s > 746h+4s> 74 this year, 88 hummingbirds pollinated the colony. what is the least number of sunbirds that must pollinate the colony to ensure that it will survive until next year?