<span>9.5 gallons 171 miles
_______________
9.5 gallons x miles
_______________
x = 171(9.5)/247 =
</span>
it's to 2.5 cuz u divide 5/2=2.5
Answer:

Step-by-step explanation:
Let
x------> the number of years
we know that

Solve for x




In this problem, given the focus at (2,4) and directrix at y = 8. then it is implied that the parabola is facing downwards. The vertex hence is at the middle of the focus and the directrix, hence at (2, 6). The general formula of the parabola is y-k = -4a ( x-h)^2. Substituting, y -6 = -1/8 *(x-2)^2. Answer is A.