How w many different driver’s license numbers can be formed by 2 letters followed by 6 numbers?

On a architect's drawing of a house, 1 inche representa 1.5

Dexter read 11 science fiction books and 5 history books. lena read 9 science fiction books and 4 history books. compare the students’ ratios of science fiction books to history books. 1. determine the ratios’ form:    science fiction books to history books 2. write the ratios as fractions:    dexter: 115; lena: 94 3. rewrite with a common denominator. 4. compare. 5. answer the question. determine which shows the correct comparison of the ratios for this problem.

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class