Can someone please tell me what part b is and please show work

Asailor is looking at a kite. if he is looking at the kite at an angle of elevation of 36and the distance from the boat to the point where the kite is directly overhead is 40 feet, how high is the kite?

Reagan lives five miles farther from school than vanessa lives. write an expression to describe how far reagan lives from school

According to the general equation for conditional probability if p(anb)=3/7 and p(b)=7/8 what is p(a i b)