Mr. jones is a geographical scientist. he researches the rise in the carbon dioxide level due to increasing pollution. in 2003, the average carbon dioxide level was about 223 billion metric tons, and in 2008, it was about 1,350 billion metric tons.

What are the sotions to the quadratic equation 9x^2=4

Hiroaki wants to find 3 3/4 - 7/8 explain why he must rename 3 3/4 to do the subtraction.

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.