Lynne bought a bag of grapefruit, pounds of apples, and pounds of bananas. The total weight of her purchases was pounds. How much did the bag of grapefruit weigh?
A bird species in danger of extinction has a population that is decreasing exponentially
Five years ago the population was at 1400 and today only 1000 of the birds are alive. Once the population drops below 100, the situation will be irreversible. When will this happen?