What is the percent of girls if there are 16 boys in a 28 student class?

I’m stuck on this i don’t understand.

Will give find an equivalent function to f(x)=5(2)^3x. the 5(2)^3x means 5(2) to the 3x power answer choices: a: f(x)=125^x(8)^x b: f(x)=10^2x c: f(x)=40^x d: f(x)=5(8)^x

Find the roots of the equation below. x^2 - 6 + 9 = 0