Dave deposited $7,500 into a bank account at the end of 3 years he earned $900 in simple interest what is the rate of intrest did the account earn per year​

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