Question 82743
Correct: 3a & 3d

3) It is approximately 300 miles from Chicago, Illinois, to St. Louis, Missouri. Allowing for various traffic conditions, a driver can average approximately 60 miles per hour.

b) How far have you traveled after 4 hours?
Answer: 280 miles
Show work in this space: D = RT 60(4) = 280 <-- Are you sure 60 x 4 = 280??

c) How far have you traveled after t hours? i.e. write a linear function that expresses the distance traveled, d, as a function of time, t.
Answer:

- This question is asking you to write D = RT in terms of T. First, substitute any known variables into the equation. Then, isolate T and you have your answer; you can start by dividing both sides by T.


e) How far will you HAVE LEFT to travel to reach St. Louis after you have traveled 4 hours?
Answer: 20 miles
Show work in this space: 300 – 280 = 20 <-- Your answer here will change after you find out whether 60 x 4 = 280.

f) How far will you HAVE LEFT to travel to reach St. Louis after you have traveled t hours? i.e. write a linear function that expresses the distance to be traveled to reach St. Louis, d*, as a function of time, t.
Answer: D = 300 - 60(T)