A, b and c are three variables. a is proportional to b^2
a is also proportional to vc
b= 4.5 when c = 2.25
Find b when c= 8
Give your answer correct to 3 significant figures.

Last year, a state university received 3,560 applications from boys. of those applications, 35 percent were from boys who lived in other states. part a)how many applications did the university receive from boys who lived in other states? part b)applications to the university from boys represented 40percent of all applications. how many applications did the university receive in all? i don't how to do part b so me and plz tell how you got your answer

: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?

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)