Solve for “z.”

Please help!

What is the quadric regression equation that fits these data

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c

*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