(16x^6) / (y^4) is the final answer
If is an acute triangle, all the angles should be acute angles.
180-38=142°
142-69=73°
So your answer is 69°, lovely~
The formula of an arithmetic sequence is the following :

A geometric sequence is in the form:
You most likely only need the first 3 digits after the decimal point but if you needed more i added them! hope this helps