How long will it take for the concentration of A to decrease from 1.25 M to 0.427 for the second order reaction A Products? (k = 1.52 Mmin)

The half-life for the zero order reaction A Products is 276 s. What is the value of the rate constant for the reaction if the initial concentration of A is 0.763?

What is the concentration of A after 26.1 minutes for the reaction A Products when the initial concentration of A is 0.750 M? (k = 0.0451 Mmin)