Dirk can clean a playground in 5 hours. geralyn can clean a playground in only 4 hours. which of the following can be used to determine the amount of time it would take for dirk and geralyn to clean a playground together?

Which statement about perfect cubes is true

Which expression gives you the distance between the points (5,1)and(9,-6)

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?