Can anyone convert 521 into scientific notation? 10 POINTS

A. 127 cm^2 b. 144.5 cm^2 c. 172 cm^2 d. 50 cm^2

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 the cone in the diagram? round your answer to the nearest whole number