The rectangle is 33ft long and 26ft wide. if the gardener wants to build a fence around the garden, how many feet of fence are required? (use the value 3.14 for π, and do not round your answer. be sure to include the correct unit in your answer.)

If the semicircle is on the 29 side: 
2(19) + 29 + 29pi/2 = 67 + 14.5pi 

This is because the radius is equal to 1/2 the diameter and the perimeter of a semicircle is radius*pi. The 2 19's come from the rectangle part of the garden and the other 29 comes from the side opposite the semicircle. 

If the semicircle is on the 19 side: 
2(29) + 19 + 19pi/2 = 77 + 9.5pi 

You simply switch the 19 and 29 values.