English translation:
If the quality control manager wants to estimate the average life of lamps with 20 hours, with a confidence level of 95% and an error of 10% is assumed. What is the sample size?
Boy that math stuff will kill a cracker
6
24% = 
multiply 25 by this fraction
25 ×
=
= 6
Answer:
Extracting out that inner right angle.
Hypotenuse = 8
Height = h
Adjacent :

Height, h :

Answer:
sum of an exterior angle is 360
2x+56+85+57+4x=360
6x+198=360
6x=360-198
6x=162
x=162/6
x=27