Can anyone help me on this one please

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.

What is the radius of a circle with an area of 78.5 cubic inches? use 3.14 for pie

You eat $0.85 for every cup of hot chocolate you sell. how many cups do you need to sell to earn $55.25