In a study a researcher takes a random sample of 620 and finds that 359 are smokers. Calculate the sample proportion of smokers

How is this equation completed? i cannot find any examples in the book.

(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.

Can someone me and explain..will award brainlest!