Please help with this question I need help on the first one if you help with both it would be greatly appreciated

: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?

The function show two sisters' savings account and the rate at which they plan to deposit money

Plz hurry finals a paper cup in the shape of an inverted cone is 8 inches tall and has a radius of 1.5 inches. how much water can the cup hold? use 3.14 for pi. round the answer to the nearest tenth. a) 12.6 cubic in. b) 18.8 cubic in. c) 37.7 cubic in. d) 56.5 cubic in.