How do you find the derivative of y=log(x)y=log(x) ?

Me. i can't figure out this question. give an explanation too. .

The width of a rectangle is half as long as the length. the rectangle has an area of 18 square feet. what are the length and width of the rectangle?

Jennifer graphs the function f(x)=x squared. then she graphs the function f(x-3). how does the graph f(x-3) differ from the graph of f(x)