The population of the world was 5.7 billion in 1995 and the growth rate is assumed to be 1.75% per year. In what year will the population reach 9 billion, the population thought to begin to create real stress on the planet?

Based on what i know about mean, this doesn't add up.

Lassify the function as linear or quadratic and identify the quadratic, linear, and constant terms. f(x) = (3x + 2)(−6x − 3) linear function; linear term: −21x; constant term: −6 linear function; linear term: −18x2; constant term: −6 quadratic function; quadratic term: 6x2; linear term: 24x; constant term: −6 quadratic function; quadratic term: −18x2; linear term: −21x; constant term: −6

Which fraction is not equivalent to 8/12 a. 2/3 b. 24/36 c. 4/10 d. 6/10