If we know the perimeter of the lot, it's pretty easy to find the length and width. Since we know that the lot is a square, we know that all sides are the same. And there are four sides on a square. Using this information, we can get an equation: 60 = x + x + x + x. Then, we need to simplify and solve the equation: 60 = 4x | x = 15 feet. Therefore, the length and width of the lot is 15 feet.
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Let's use the variable "r" to represent the investment rate of the stocks: 2r(500) + r(800) = 45 1000r + 800r = 45 1800r = 45 r = 0.025 2r = 0.05 The $500 is invested at 5%