Two classmates are preparing research papers and are organizing their information on index cards.


Keiko is using 3 in. x 5 in. cards.


William is using 4 in. x 6 in. cards.

ASet up a proportion to determine if the students are using index cards that are similar. Are they similar?

BA third student, Joel, is writing his information on paper that measures 12 in. x 8 in.

Is this similar to either Keiko's or William's cards? Show your setup and work to support your answer.