A Kuiper Belt object orbits the sun at an average distance of 43.4 AU with an eccentricity of e = 0.15. Calculate the comet's perihelion distance in AU using the equation: perihelion = a (1 - e).

The first-order reaction a→2b+c has rate constant 0.538 s−1. if the initial concentration of a is 0.867 mol l−1, what is the half-life of the reaction in seconds? remember to use correct significant figures in your answer (round your answer to the nearest hundredth). do not include units in your response.