Find PD, the north-south distance across the pond. Justify your method. If necessary, round your answer to the nearest meter. I'm thinking these triangles are similar due to AA, but I'm not sure if I'm right. I have no clue how to find PD with this.

Please help!

Determine the number of outcomes in the event. decide whether the event is a simple event or not. upper a computer is used to select randomly a number between 1 and 9 comma inclusive. event upper b is selecting a number greater than 4. event upper b has nothing outcome(s). is the event a simple event? (yes or no) because event upper b has (fewer than, exactly, more than) one outcome.