1992 the average credit card debt for an American family was $3275. 2006 the average credit card debt free family was $8900 find the average rate of change of credit card debt with respect to time

What is the total surface area of this square pyramid?

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?

Percent increase and decrease. original number: 45 new number: 18