What is the lower class limit of the class 13–17?

Polynomial that can be factored as (3x-4)(3x+4)

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?

Which of the following is not a subset of {1,2,3}?