Which of the following rectangular prisms has a base area of 40 cm2 and a volume of 160 cm3?

The base is 4 x 10. which means that you can divide 160 by 40 to get the hieght. (The height is 4)

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.