Please answer both! Please and thank you!

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.

Mr.walker is looking at the fundraiser totals for the last five years , how does the mean of the totals compare to the median?

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog