How to find a surface area if the numbers are 13,4 and 5

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.

David leaves his house to go to school. he walks 200 meters west and 300 meters north. how far is david from his original starting point?

In triangle abc, angle c is a right angle. find the value of the trig function indicated. find tan a if c = 17 and a = 8