Each best behaved class will receive 1.5 pounds of candy.
To get his answer you just have to divide 15 by 10
15 divided by 10 = 1.5 pounds
He watches TV at around 8:00 P.M., though it could be any other time around the world.
I believe the answer is D. because -12 + -1 equal -13
Average speed = total distances / total time
3115.8 / 7.2 = 432.75 mi/h