Suzanna wants to measure a board, but she doesn’t have a ruler to measure with. however, she does have several copies of a book that she knows is 17 centimeters tall.

suzanna lays the books end to end and finds that the board is the same length as 21 books. how many centimeters long is the board?
suzanna needs a board that is at least 3.5 meters long. is the board long enough? explain.

Abag has more green balls than blue balls, and there is at least one blue ball. let bb represent the number of blue balls and let gg represent the number of green balls. let's compare the expressions 2b2b and b + gb+g. which statement is correct? choose 1

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?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way