(Answer is below)
Let's solve this step-by-step.
1. Prime factorization of 384.

2. Apply the exponent rule. (Formula:
)

3. Apply the radical rule. (Formula:
or
)

3a. Solve 2 to the 6th power.

4. Multiply 2 by 3. (Note: Put the 8 in your final answer)

Your answer is: 
Let me know if you have any questions.
~ Lily, from Brainly.
Answer:
The answer is 87.74
Step-by-step explanation:
I just put it in the calculater,lol
We know that a = b and c = 30
Since b + 30 = 90, we know b = 60.
That means a = 60
a = 60
b = 60
c = 30