Real-world meanings of signed numbers One example of real-world numbers that can be positive or negative is elevation.
measures a location's distance above a base level, and depth measures the distance below a base level.
What does the base level represent?

Suppose that the price p (in dollars) and the weekly sales x (in thousands of units) of a certain commodity satisfy the demand equation 4p cubedplusx squaredequals38 comma 400. determine the rate at which sales are changing at a time when xequals80, pequals20, and the price is falling at the rate of $.20 per week.

In the xy-plane, if the parabola with equation passes through the point (-1, -1), which of the following must be true?

Hannah paid $3.20 for 16 ounces of potato chips. hank paid $3.23 for 17 ounces of potato chips. who paid less per ounces?