Solution:
If the <u>numerator</u> and the <u>denominator</u> have like bases in exponents, then the <u>exponents</u> subtract.
- =>

Thus, 7b is the simplified expression.
Step-by-step explanation:
Let the measure of required angle be x degree

Thus, first option is the correct answer.
X= 50
Replace the x with the given number.
Y= 50-20
Y= 30
Just do 1/8 times 1/8. Hope this helped !!