−28=19 solve to this question

How do i do this activity, is appreciated

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

Which exponential function has an initial value of 2? f(x) = 2(3x) f(x) = 3(2x)