Your baby pygmy hippo’s weight, measured in pounds (lbs), is a function of its age, measured in days. That is, \(w(t)\) gives the weight of the hippo \(t\) days after birth.
You are buying stickers to give out to celebrate your baby pygmy hippo, and the sticker company has offered you a discount if you buy in bulk. The total cost in dollars is given by a function \(c(x)\) for buying \(x\) stickers.