What is the correct answer! Thank you for your help

The plum pudding model of the atom states that ?

Aria drove to the store, did some shopping, and then came home. during maria's trip, when was her displacement equal to zero?

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.