Find the slope between (6,1) and (3,7)

How do i simply this radical expression?

(c) a vine called the mile-a-minute weed is known for growing at a very fast rate. it can grow up to 0.5 ft per day. how fast in inches per hour can the mile-a-minute weed grow up to? show your work using the correct conversion factors.

The curved part of the figure is the semicircle what is the best approximation for the area of this figure