80% of what number is 16?
a. part=
b. total=
c. percent=
d. write and solve the proportion

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?

Write as a product: ac^2–ad+c^3–cd–bc^2+bd

Using this spinner and a number cube, which simulation would you answer this question? a school survey of 90 sixth graders showed that 25% of them play basketball and about 17% play soccer. what are the chances that a sixth grader plays basketball and soccer?