Question

A probe is being launched from Earth to gather data about Neptune's atmosphere. The function f(x) gives the probe's distance from Neptune x days after launch. The distance is measured in billions of miles.
What does f(0)=2.7 tell you?

Answer 1

The notation f(0) = 2.7 indicates that at the time of the probe's launch (0 days after launch), the distance from Neptune to the probe is 2.7 billion miles. This means that at the moment the probe is launched, it is located 2.7 billion miles away from Neptune.