There are 30 students on the debate team and 20 students on the math team. ten students are on both the math team and debate team. what is the total number of students on either team?
a) 20
b) 30
c) 40
d) 50

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

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?

The sum of the squares of two numbers is 8 . the product of the two numbers is 4. find the numbers.