I typed in rate =0.003[A]^0[B]^1/2 I'm not sure where I'm wrong on my math

Use the initial rates method with the given data to determine the rate law for the hypothetical reaction shown below. A+BC - Write the rate law in the form of rate =k[A]m[B]n, specifying the value of the rate constant ( (k) and the reaction orders ( m and n ). - Include three significant figures in the rate constant. - Enter your answer in decimal form, do not use scientific notation