Answer:
D
Step-by-step explanation:
The triangle is an isosceles triangle which means that two sides are the same, A is the same size of the equal side so A is D.
Hello,
Here is your answer:
The proper answer to this question is option D "4.19%".
Your answer is D.
If you need anymore help feel free to ask me!
Hope this helps!
By the chain rule,


We also have

,

, and

, so at this point we get