Find the missing length indicated

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?

Olga used 100 ounces of flour to make 225 muffins. how many ounces of flour will be used to make 300 muffins?

Afair die is cast four times. calculate the probability of obtaining exactly two 6's round to the nearest tenth of a percent