The formula C=3.14d can be used to approximate The circumference of a circle given its diameter company a manufactures and sells a certain washer with an outside circumference of 7 cm the company has decided that washer his actual circumference is the interval 6.9

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?

15 and 14.7 are 1 apart, so 15 – 14.7 must be 1.

The difference between two numbers is one. three times the larger number minus two times the smaller number is 9. what are the two numbers