Darnell's car used 8 gallons of gasoline to travel_340 miles. After a mechanic worked on
the car, it used 7 gallons of gasoline to travel. 350 miles. If the price of gasoline was
approximately $4.00 per gallon, how much less to the nearest cent per mile did it cost:
to run the car after the mechanic worked on it?
Show your work

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.