Please help I will reward brailiest

Can someone check if i did this correct. it’s number 4 if you’re wondering.

Need 50 will mark brainliest answer. find the lengths of all the sides and the measures of the angles.

How do i start to solve? would appreciate a walk-thru! a bird sitting 16ft above the ground in an apple tree dislodges an apple. after how many seconds does the apple land on the ground? (assuming that no branches will interfere with it's fall)