Can someone pls tell me if this is right? if its not then what is the right answer?

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

Bob is putting books on a shelf and takes a break after filling 18 1/2 inches on the book shelf. the book shelf is now 2/3 full. how long is the entire bookshelf?

These box plots show the number of electoral votes one by democratic and republican presidential candidates for the elections from 1984 through 2012. which statement best compares the spread of the data sets