30 degrees is the value of the missing angle. Since, this triangle is known as an Isosceles all angles are equal.
For this case we have that the expression in its exact form is the same, that is:

If it is expressed in decimal form we have:

If we want equivalent expressions, we must first mention the following property of powers and roots:
![\sqrt [n] {a ^ m} = a ^ {\frac {m} {n}}](https://tex.z-dn.net/?f=%5Csqrt%20%5Bn%5D%20%7Ba%20%5E%20m%7D%20%3D%20a%20%5E%20%7B%5Cfrac%20%7Bm%7D%20%7Bn%7D%7D)
Then, we can rewrite the expression as:

Answer:

One tenth of 90. Because regular 9 is one tenth of 90, so decimal 9 is one tenth of decimal 90. Hope you understand ha ha ^_^
So the right answer is 9g^20p^16
look at the attached picture
Hope it will help you
Good luck on your assignment
Step-by-step explanation:
here is tha answer..hope it helps..mark me as brainliest