Cos(30) = x/11
cos(30) × 11 = 9.53
sin(30) × 11 = 5.5
perimeter = 11+9.53+5.5 = 26.03
Hope this helps

The incorrect one is 35 × 10⁵
it can be written as :
Set up a ratio between the small triangle and the large one.
AD/ AE = AC / AB
(8 + 2)/8 = 10 / x
10/8 = 10/x Cross multiply
10x= 80 Divide by 10
x = 8
Answer 4th one down. <<<<====
The answer is the second option, increase (1,infinity) and decrease (negative infinity,1)
Look at the x axis, not y