You practically answered this one yourself by giving some of the equation we need already filled in. It would look like this: A(t)=500(1.04)^7. Start by taking 1.04 to the power of 7 to get A(t)=500(1.3159). Finish by multiplying to get A(t)=$657.97
F(x)=x+c, where c is an arbitrary constant. if c is positive then translation above if c is negative then translation down reflection of f(x)=x^2 across x-axis then f(x)=-x^2