How do i work out this question?
a train travels from london to manchester it leaves at 16 55 and it arrives at 19 45. work out the number of minutes the train takes to travel from london to manchester

How do you answer this question? (step by step)

1- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis.2- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in the first question?

There are 93 calories in a small candy bar how many calories are ther in a half dozen small candy bars?