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 us
ed 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
3 feet west + 4 feet east means that the length of the rectangle is 7 2 feet south and 1 foot north means that the height (or width) 3. Since the rectangle is 3 ft by 7ft the total distance around (perimeter) is 2 (l+w) or in this case 2 (7 +3) = 2 (10) = 20 ft Answer b Drawing a picture helps.
