Way and show all work. 13. A 380-cubic-centimeter sample of titanium has a mass of 1710 grams. Find the concent
of a titanium sample that has a volume of 532
cubic centimeters. Write and then solve a
proportion to find the answer.

The first one, i believe, would be correct. all the others have one thing in common, and that's that they have repeating numbers. in the second one, x and y have repeating 6's and 3's, and in the third, x and y have repeating 6's as well. in the last one, there are repeating 3's. the first one has no repeating numbers.