By dividing the price per gallon, we see that for every gallon he pays three dollars.
18 Dollars/ 6 Gallons=3 and 21 Dollars/7 Gallons= 3.
So for 8 Gallons, if he pays that same rate of 3 Dollars, he will pay $24.
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Call 911 then but the answer is $4 because 12/3 is 4
Answer:800
Step-by-step explanation:

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Using Z table to get InvNormal(0.9893)=2.30


30 minutes / 3 miles = 10 minutes for 1 mile
7 miles * 10 minutes per mile = 70 minutes total to run 7 miles