Can someone help me with question (a) and (b)? Thanks! :)

Rob spent 25%, percent more time on his research project than he had planned. he spent an extra h hours on the project. which of the following expressions could represent the number of hours rob actually spent on the project? two answers

Of the 304 people who attended a school play, 5/8 were students. how many of the people who attended were students.

Find the distance between the point (-3,-4), and (see the picture below)