Aladder leans against the side of a house. the angle of elevation of the ladder is 69 degrees, when the bottom of the ladder is 12 ft from the side of the house . find the length of the ladder.

Margie is practicing for an upcoming tennis tournament. her first serve is good 20 out of 30 times on average. margie wants to know the estimated probability that her first serve will be good at least four of the next six times she serves. how could she design a simulation for this scenario?