3) Two cars leave Cincinnati at the same time. Car A moves East at a constant speed of 60 miles per hour, while car B moves West at a constant speed of 45 miles per hour. How far apart will the vehicles be after 2.5 hours?
(A) 15 miles
B) 37.5 miles
105 miles
D) 262.5 miles

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.