AP Chemistry

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I have no idea where to start with this problem:
A certain reaction has the following general form: aA -> bB

At a particular temperature and (A)o = 2.00(10^-2)M, concentration versus time data were collected for this reaction, and a plot of In(A) versus time resulted in a straight line with a slope value of -2.97(10^-2)min ^-1.
a. Determine the rate law, the integrated law, and the value of the rate constant for this reaction.
b. Calculate the half-life for this reaction.
c. How much time is required for the concentration of A to decrease to 2.50(10^-3)M?

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