Answer:

Step-by-step explanation:
Given that,
The base of a triangle = 2 km
The perpendicular height of the triangle = 
We need to find the value of x. It is the Hypotenuse of the triangle. It can be solved as :

So, the value of x is equal to
.
Answer:

Step-by-step explanation:
we have

we know that

substitute

Answer:
They are both due to the wave nature of light.
Area is equal to length times width, so 1.3x would represent the area. B is the answer.