I wish I could help but I'm not good in math at all
Step-by-step explanation:
Length of arc of a circle is given as:

Thus, the measure of central angle is 140°.
Answer: a. 55
Step-by-step explanation:
The formula to find the geometeric mean between two numbers a and b is given by :-

The given numbers are : 275 and 11
The geometric mean of 275 and 11 is given by :-

Hence, the geometric mean of 275 and 11 is 55.
So , the correct option is a. 55 .
Answer:
B)34
Step-by-step explanation: