Answer:
4 miles
Step-by-step explanation:
In order to find how many miles the car will travel in 0.5 hours, we can set up a proportion.

We can now cross multiply to find the value of x.

So the car can travel 4 miles in 0.5 hours.
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Step-by-step explanation:
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7/10s of 40 would be 28 so that leave 12 hours to work inside