Which is the following is equal to thirty-nine and thirty-eight thousandths?

How long must $542 be invested at a rate of 7% to earn $303.52 in interest? in a easier way

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm

If f(x)=x+7 and g(x)=1/x what is (fog)(x)