If the first increase was 50%, that means that the price between the first and the second increase is 150% of the original. And as you need 6 (which is 4*150%) times the original, the price was increased for 450%. So, the last peecent increase is
Answer:
≈ 106.4
Step-by-step explanation:
Pythagorean Therorem:
Equation: 
-784 -784


= 106.3766892
Round to nearest tenth:
≈ 106.4
Hope I helped :)
Set the angles equal to 180
x + 2x + 3x = 180
6x = 180
Solve for x
6x = 180
x = 30
Plug that into angle C
2(30) = 60
Angle C is 60 degrees