Someone help me with this questions pleaseee

:24% of students in a class are girls. if there are less than 30 students in this class, how many students are there? how many girls are there?

Which of the following best describes the figure?

Onnie is considering doing some long term investing with money that she inherited. she would like to have $50,000 at the end of 30 years. approximately how much money would lonnie need to put into an account earning 6% interest compounded annually in order to meet her goal?