There are two reaction vessels, one containing A and the other containing B, with equal concentrations at t=0. If both substances decompose by first order kinetics, where kA = 4.70 × 10⁻⁴ s⁻¹ kB = 3.2 × 10⁻³ how much time must pass to reach a condition where [A] = 3.05[B]?

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.