If Jill has 2 more cats than dogs. How many fewer dogs does Jill have

Liam's parents are driving three times as fast as liam is biking, but they left later than he did. if his parents caught up with him two hours after he left, how much later than liam did they leave?

What is the volume of the sphere shown below with a radius of 3?

Sam claims that cos x =sin y if x and y are congruent angels. is sam correct ?