Can someone me with this i don’t understand

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.

Sketch one cycle if the cosine function y=2cos2theta

Ab based on the given diagram, if m_1 = 60° then m 2 = 30 60 90 180