Answer: 1/40 or .025
See the attached image for the explanation.
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NormalCdf(-2,2,0,1)=.9545
95.45%
I think it’s infinitely many
We need to solve the speed formula for d. To do so, let's start by moving the number of the left hand side:

Square both sides to get rid of the square root:

Now plug the known value of the speed to find the distance:

So the closest answer is the last one: d=0.155km