1/40 would be your answer because 0.025 is would be 25/1000. Simplify that then you would get 1/40.
The answer for the problem above is 19.147 meters is the total length of the wires.
A constant is a number that never changes value. Example:
x + 3 = 5, 3 and 5 are constants.
Answer:
-2(x+5) is equivalent to -2x-10
