Air pocket 277 feet after climbing 128 feet it drops another 119 feet

Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

Hi, can anyone show me how to do this problem? 100 points for this. in advance

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why? a. point c could be the interior of aob but it is not the only case b. point c is the interior of aob c. point c is not the interior of aob d. the given is not possible for the plane geometry answer