HELP THIS IS URGEN
In the figure, m angle 1 equals (8 x plus 9) degrees, m angle 2 equals (5 x plus 14) degrees, and m angle 4 equals (14 x plus 12) degrees.
Your friend incorrectly says that m angle 4 = 97 degrees.
What is m angle 4?
What mistake might your friend have made?

You drop a rubber ball off the roof of a 50 meter high building onto a paved parking lot. it bounces back up with every bounce, but not quite all the way back up to you. after the first bounce it bounces back only 80 percent of the distance it was dropped from. the pattern continues, meaning after every bounce it comes up to just 80 percent of the previous maximum height. so if before the first bounce the height is 50 meters, what height does the ball reach after the fifth bounce? round your answer to one decimal place and chose the correct response from the choices below:

Select the margin of error that corresponds to the sample mean that corresponds to each population: a population mean of 360, a standard deviation of 4, and a margin of error of 2.5%

The anwser cause i do not understand just plez