which of the following properties could be used to rewrite the expression. (2/3×1/5)×5/2 as 1/5×(2/3×5/2). A)the associative property followed by the commutative property. B) the commutative property used twice, once on each of the two multiplication. C) the commutative property followed by the associative property. D) the associative property.​

the law of definite proportions states samples of a compound will always contain the same proportion of elements by mass. in other words, a given compound will always contain the same elements in the same proportions by mass.the law of multiple proportions states when two elements combine with each other to form more than one compound, then the weights of one element that combine with a fixed weight of the other are in a ratio of small whole numbers.

Number nine is f(x)= 40x : ) hoped i ya

Not sure what the question is but i hope this x = years100 * x