Allison is having a great deal of difficulty in her statistics class. She goes to her teacher to discuss ways in which she can improve her skills, or even drop the class if necessary. Alison is demonstrating .

24-karat gold is considered to be pure gold. 18-karat gold is considered to be about 75% gold. what is 18-karat gold considered a mixture rather than a pure substance? a) it has a variable composition of other elements and minerals. b) its color is different than pure gold. c) the gold atoms are not arranged in a repeating pattern. d) it can be melted and transformed into a different substance.

The chart shows four articles read by the students in a science class

What happens in puerto rico in 2012 to celebrate the anniversary of clemente's 3000th hit