Answer: it will take them 4 hours to be 640 kilometers apart.
Step-by-step explanation:
Let t represent the time it will take for both trains to be 640 kilometers apart. It means that the total distance that both trains will covered in t hours is 640 kilometers.
Distance = speed × time
A train leaves Little Rock Arkansas and travels north at 75 kilometers per hour. Distance covered after t hours would be 75 × t = 75t
Another train leaves at the same time and travels south at 85 kilometers per hour. Distance covered after t hours would be 85 × t = 85t
Since the total distance covered is 640 kilometers, then
75t + 85t = 640
160t = 649
t = 640/160
t = 4 hours
Put in your calculator tang^-1 (17). 86.63
Tan -1(8/40) = 11.31
Answer:
81%
Step-by-step explanation:
divide 162 by 200
Answer:
i.) 66% of the earth is covered in water
ii.) 33% is continental
Step-by-step explanation:
Answer:
b)-3
c)17
d)-11
Step-by-step explanation:
4,-7)
-3
