Iam wallpapering a room 9ft by 9ft by 9ft high. how many square feet of paper will he need if thete sre 93 ft^2 of openings in the room

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- 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. 3- 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 part b?

Can someone explain to me how to do

An elevator travels 310 feet in 10 seconds. at that speed, how far can't his elevator travel in 12 seconds?