Help me with this question please

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

What is the equation of a line passing through the point (6,1) and parallel to the line whose equation 3x=2y+4

Multiply. write your answer in simplest form. 3/8 x 5/7