3f+3< 6 or 7f-20 > 50 i don't understand this

Given the parent function of [tex]f(x)=x^4[/tex], what change will occur when the function is changed to [tex]f(\frac{1}{2} x)[/tex]?

Can someone me and do the problem plz so i can understand it more better

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?