Please answer the question below

In the 30-60-90 triangle below side s has a length of and side r has a length

Can someone me with this problem . show your work .

How many of the 250 grandparents in the population would you expect to prefer online shopping with merchant a? merchant a: 4 merchant b: 6 merchant c: 2 merchant d: 3 other: 5 none: 5 answer choices: a.about 4 b.about 8 c.about 40 d.about 21