After 5 seconds the height of the balloon is 20 feet. The balloon continues to rise at the same rate

Do you mind if you guys me with this question i’m on number 8

*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

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64