The Chang family is on their way home from a cross-country road trip. During the trip, the function D(t) = 2,280 - 60t can be used to
represent their distance, in miles, from home after t hours of driving. What is the value of t when D(t) = 1,200? What does that value
represent?
A t = 20; the Chang family has been driving for 20 hours
B. t = 20; the Chang family has 20 hours more to drive to get home
C. t = 18; the Chang family has been driving for 18 hours
D. t = 18; the Chang family has 18 hours more to drive to get home