Answer:
10
Step-by-step explanation:
We'll note the numbers as 

The percentage that is saved upon parking for 4 hours is 25%.
Parking for 4 hours should warrant $8, but the new deal deducts $2 from the original rate. $2 ÷ $8 = 0.25 or 25%.
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Answer: (2,-1)
Step-by-step explanation:
29 miles
because town y is between town x and town z so you can take the distance between town x and town z and subtract the distance from town y to town z
Answer:
2.56 * 10^11 L
Step-by-step explanation:
1 body has 40 L
Thus, the amount in 6.4 billion would be;
40 * 6.4 * 10^9
= 256 * 10^9
= 2.56 * 10^2 * 10^9
= 2.56 * 10^11 L