Answer:
Always
Step-by-step explanation: because I did it and got the answer right
Zero is actually a whole number, rational number, and integer, but it is not a natural number
Answer:
Observe the attached image
Step-by-step explanation:
We know that
is an exponential function, therefore its graph must have the form that corresponds to this type of functions.
The first thing to do is find the cut points of the function.
Cut point with the y axis:

The function cuts the y-axis on 
Cutting point with the x axis:

To clear x we must apply log on both sides of the equality, but the log(0) is not defined. Then, the function does not cut to the x axis.
The graph that represents the function f(x) is the one that cuts in
and does not cut the x-axis
One km is about 0.621371 so then you do 400/0.621371 which is 643.738 then you have your answer.400m:643.738km
I think the answer is as follows:
70/574 = x/100
574x=7000
574/7000 = .082
final answer is 820
820 x 70% = 574