I need help with this question

The long jump record, in feet, at a particular school can be modeled by f(x) = 19.6 + 2.5ln(x + 1) where x is the number of years since records began to be kept at the school. what is the record for the long jump 11 years after record started being kept? round your answer to the nearest tenth.

Find the greatest common factor of the followig monomials 21u^5v,3u^4v^6, and 3u^2v^5

What numbers are included in the set of integers? what numbers are not included?