At christmas a bookstore sold 72 books if the ratio of books if the ratio to books is 9: 2 how many bookmarks did the store sell

12/11c

or

12

c

11

need more information

step-by-step explanation:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.

it’s the first one your welcome