Final answer:
The altitude on Mt. Everest, the cost of this book, and the acceleration of gravity are examples of vectors.
Step-by-step explanation:
Vectors are quantities that have both magnitude and direction. From the given list, the following examples are vectors: the altitude on Mt. Everest, the cost of this book, and the acceleration of gravity. These examples have both a numerical value (magnitude) and a direction associated with them. For instance, the altitude on Mt. Everest can be positive or negative, depending on whether the measurement is above or below sea level.