sat suite question viewer
A rocket contained kilograms (kg) of propellant before launch. Exactly seconds after launch, kg of this propellant remained. On average, approximately how much propellant, in kg, did the rocket burn each second after launch?
Explanation
Choice A is correct. It’s given that the rocket contained of propellant before launch and had remaining exactly seconds after launch. Finding the difference between the amount, in , of propellant before launch and the remaining amount, in , of propellant after launch gives the amount, in , of propellant burned during the seconds: . Dividing the amount of propellant burned by the number of seconds yields . Thus, an average of of propellant burned each second after launch.
Choice B is incorrect and may result from conceptual or calculation errors.
Choice C is incorrect and may result from conceptual or calculation errors.
Choice D is incorrect and may result from finding the amount of propellant burned, rather than the amount of propellant burned each second.