Can someone explain these math questions to me

If the wwight of a package is multiplied by 7/10 the result is 65.8 find the weight of the package

Polygon hh is a scaled copy of polygon gg using a scale factor of 1/4. polygon h's area is what fraction of polygon g's area?

For g(x) = 5x - 3 and h(x) = [tex]\sqrt{x}[/tex], find (g · h)(4)