What is the volume (in cubic units) of a cylinder with a radius of 4 units and a height of 5 units? Assume that π = 3.14 and round your answer to the nearest tenth when necessary.

Write an equation for the function that includes the points (1,4/5) and (2,2/3)

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?

Iknow its nothing to do with education, but what type of thing should i wrote here? ? : ) its for mcdonald's btw.