I need help with math problem

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.

Can someone me with the property questions for 12 13 and 14 plz

What effect would doubling all the dimensions of a triangular pyramid have on the volume of the pyramid? explain your reasoning.