Question 78951
It is approximately 480 miles from Los Angeles, California, to San Francisco, California. Allowing for various traffic conditions, a driver can average approximately 60 miles per hour.
a) How far have you traveled after 3 hours?
distance = rate*time
distance = (60mi/hr)(3 hr)= 180 miles
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b) How far have you traveled after 4 hours?
Answer: 
Show work in this space.
distance=rate*time
distance=60mph*4hr = 240 mi
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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:
distance=rate*time
distace=60t miles
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d) How far will you HAVE LEFT to travel to reach San Francisco after you have traveled 3 hours?
Answer: 
Show work in this space.
Let x be the remaining distance.
x=480-60*3
x=480-180
x=300 miles
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e) How far will you HAVE LEFT to travel to reach San Francisco after you have traveled 4 hours?
Answer: 
Show work in this space.
Let x be the remaining distance.
x=480-60*4
x=480-240
x=240 miles
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f) How far will you HAVE LEFT to travel to reach San Francisco after you have traveled t hours (i.e., write a linear function that expresses the distance to be traveled to reach San Francisco, s, as a function of time, t).
s=480-60t

Cheers,
Stan H.