Le professeur de SVT montre à ses élèves le relevés des hauteurs des cinq peupliers : 35M 38M 34M 41M 32M. 1) Quelle est la plus grande valeurs de cette série ? La plus petite ? 2) Calculer l'étendue de cette série. Peut-on dire que les valeurs de cette série sont très dispersées ? 3) Calculer la hauteur moyenne des peupliers de la série. 4) déterminer la médiane de cette série de hauteurs. Donner une interprétation de ce nombre

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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?