Ceiling Function is the least integer that is greater than or equal to x.
Odd integers between 8 and 26
{ 9,11,13,15,17,19,21,23,25}...added = 153 <==
Answer:
-6
Step-by-step explanation:

<span>You did not include the equations that you want to assess whether they can be used to solve for the radius (r).
Likely, the equation of the circumference, C = 2*Pi*r is included, if so => r = C / (2*Pi).
If you round Pi to 3.14, the equation may be written r = C / 6.28.</span>