Situation: Find the age of the bird skeleton to the nearest year. A geologist in South America discovers a bird skeleton that contains 61% of its original amount of C-14. Enter the correct answer. N= Noe DONE No = inital amount of C-14 (at time t=0) 12 N = amount of C-14 at time t K = 0.0001 t = time, in years Find the age of the bird skeleton to the nearest year
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Acredit card advertises an annual interest rate of 23%. what is the equivalent monthly interest rate?

The position of a moving particle is given by the position function: f(t)=-9t-t^2-0.2t^3+0.1t^4 a. at what time does the particle reverse direction? b. when is the displacement positive? (round one decimal place and answer in interval notation) c. when is the displacement negative? (round one decimal place and answer in interval notation) d. when is the particle’s acceleration positive? (round one decimal place and answer in interval notation) e. when is the particle’s acceleration negative? (round one decimal place and answer in interval notation)

*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