How does the process of grounding occur during a lightning strike?

Let f(x) = x4- 8x2 . find the relativeextrema of this function using the second derivative test.

The pressure proportional to the area a- inversely b- directly c- increase d-decrease

There are two-speed cameras, one in an are where the speed limit is 30 km/h and another where the speed limit is 50 km/h. in which will there be a smaller time interval between the photographs? explain your answer.